The short answer
Eleven Mile Canyon is the roadside canyon on the South Platte — about eleven miles of river from the Eleven Mile Reservoir outlet down to Lake George on US 24, with County Road 96 running beside the water for the productive upper six. The top 3.8 miles, from the dam down to the Wagon Tongue Gulch Road bridge at Spring Gulch, are designated Quality Waters: catch-and-release, artificial flies and lures only. Below that bridge it's statewide rules. The reservoir releases at 38–45°F all year, so the midges never stop and every other hatch runs late: BWOs on grey afternoons in March–April and again in September–October, PMDs from late May into mid-June, caddis through the summer evenings, and a Trico spinner fall that lands between 11 a.m. and 2 p.m. rather than at dawn. Carry midges in #20–24, a BWO dry in #22–24, and streamers — this is the section of the river where a big fly is a plan rather than a last resort. A 9-foot 5-weight covers the dries and nymphs, a 6-weight throws the streamers, and full chest waders are not optional because several of the better slots are chest-deep. The working flow band here is 80–300 CFS. And don't stop at the first busy pullout.
At a glance
| Water type | Roadside tailwater canyon — County Road 96 runs beside the river on the graded bed of the old Colorado Midland Railway, which is why a canyon this steep has a driveable road down its length. There is no railway now: no track, no trains, a few old tunnels. |
|---|---|
| The reach | Roughly eleven miles from the reservoir outlet down to Lake George on US 24, with the productive upper six along the road. |
| Regulations | The top 3.8 miles, from the dam to the Wagon Tongue Gulch Road bridge at Spring Gulch, are Quality Waters: catch-and-release, artificial flies and lures only. Below the bridge it reverts to statewide rules. The bridge is a thing you can look at, so make the check in the vehicle. |
| Water temperature | The reservoir releases at 38–45°F all year, which is why the midges never stop and every other hatch runs about two hours later than it does downstream. |
| Flows that matter | The working band is 80–300 CFS. The dry-fly window sits higher, roughly 150–250, while typical flow here is 50–150 — so the canyon spends most of the year below its own dry-fly ideal and comfortably inside its wading range. |
| Live gauge | CO DWR station PLAGEOCO. |
Getting there, and what's on the ground
| Drive from Colorado Springs | About forty-five minutes: US 24 west through Woodland Park and Florissant to Lake George, then north onto CR 96. |
|---|---|
| Drive from Denver | US 285 south to Lake George and the same turn onto CR 96. |
| Day-use fee | Eleven dollars per vehicle at the Forest Service entrance station at the mouth of the canyon, or $100 for an annual pass to this site. A bus or van of ten or more is $25. |
| The fee is not a State Parks fee | It is a Forest Service fee, so a Colorado State Parks pass buys you nothing here — that pass is for Eleven Mile State Park, the reservoir above the dam, which is a different property with a different gate. The booth has historically been cash-only, so carry notes rather than a card and a plan. |
| Where you park | Pullouts along CR 96, marked with standard Forest Service signs. There is no trailhead to aim for, because the road is the access. The upper canyon near the dam outlet fills first on a weekend morning; the pullouts four to six miles down stay consistently quieter. |
| Winter road access | Do not assume the whole canyon road is driveable in January. Confirm the road's status before you commit to the drive — the pullout you are planning on may be on the far side of a gate. |
| Parking hazard | You are stepping out onto a canyon road other vehicles are using, often around blind bends, while carrying a nine-foot rod and looking at the river. Park fully off the road and gear up where you are visible. |
| Private ground | The water along CR 96 is public, but private inholdings exist near the canyon and posting is worth reading. |
Rows I can't source are left off this table rather than guessed at.
Hatch Reports
Latest conditions, flows, and what's hatching on this section.
The road is the whole argument
Every other reach on this river makes you choose something. Cheesman Canyon charges you a 1.3-mile walk down and a harder one back up. The Dream Stream makes you cross open ground with nothing to hide behind. Eleven Mile charges you nothing at all: CR 96 runs alongside the river through the productive water, and you can look at a run through the windscreen, decide against it, and be looking at the next one ninety seconds later.
The road is there because somebody else did the hard part. CR 96 runs on the graded roadbed of the Colorado Midland Railway — the first standard-gauge railroad over the Continental Divide, which ran passenger trains up this canyon from 1887 until it stopped operating in 1918. There is no railway now — no track, no trains. What’s left is the grade you’re driving on and a few old tunnels. It’s why a canyon this steep has a driveable road down its whole length instead of a trail.
That changes three things.
Who it suits. A canyon you can drive is a canyon you can bring a four-year-old into, or fish for ninety minutes on the way home, or reach in January when the walk into somewhere else is a sheet of ice. I hike into this canyon in the summer with my son, and it works because the distance between parked and fishing is whatever I decide to make it that morning.
What it does to the pressure, which is not what you’d guess. A road does not automatically mean crowds. It means the crowd gets distributed: instead of everyone walking down one trail and fanning out from one junction, anglers peel off at pullouts along eleven miles of river. In practice the canyon is less crowded on a weekend than Deckers and less crowded midweek than Cheesman. The busy pullouts are the predictable ones — the upper canyon near the dam outlet fills first on a weekend morning — and the ones several miles down from the dam stay consistently quieter.
And your tactics, because scouting is free. On hike-in water you commit to a beat because you walked to it. Here you don’t have to commit to anything. This is the one stretch of the South Platte where I genuinely fish uncommitted — both boxes in the pack, no plan for the day, and I let what I can see from the road decide. Drive past the first busy pullout on principle. Three more minutes of windshield scouting buys you water nobody is standing in.
Be clear about what you’re actually scouting for, though, because you cannot see fish from a moving vehicle and anyone who says otherwise is describing a rock. From the road you can read three things and only three: the water type in front of you — flat, pocket, or run — whether the surface is dimpled or dead, and how many vehicles are already parked at it. That is enough to decide with. Pick the water type you’re rigged for, or rig for the water type you’ve decided to fish; the mistake is arriving with one rig, finding the wrong character, and fishing it anyway because you’re already booted up. Which is the second thing the road buys you, and the one most people leave on the table: the truck is never more than a couple of hundred yards away, so a rig change costs you five minutes instead of a hike. Change it. Carry the rod you’re not using in the vehicle rather than in your hand.
Getting there is the short version of all of this: from Colorado Springs it’s US 24 west through Woodland Park and Florissant to Lake George, then north onto CR 96, about forty-five minutes. From Denver it’s US 285 south to Lake George and the same turn. There is no trailhead to aim for, because the road is the access.
You pay to get in. There is a Forest Service entrance station at the mouth of the canyon and the day-use fee is $11 per vehicle, or $100 for an annual pass to this site if you’re going to be up here more than nine times a year. Two things people get wrong about it. It is a Forest Service fee, so a Colorado State Parks pass buys you nothing here — that pass is for Eleven Mile State Park, which is the reservoir above the dam and a different place with a different gate. And the booth has historically been cash-only, so have notes in the truck rather than a card and a plan.
The cost of all that is real, and it’s the same cost the other roadside water on this river pays: the fish nearest the obvious pullouts have seen more flies than the fish half a mile from one. The fix is unglamorous. Walk. Not far — a couple of hundred yards up or down from where you parked is usually enough, because almost nobody does it.
Three rivers in eleven miles, and a rig for each
The canyon does not have one character. It has three, they arrive in order as you drive downstream from the dam, and they want different things from you. Which is why the honest packing instruction for this canyon is three rigs rather than one, and why having the truck ten yards away matters more than the convenience of it sounds.
It also changes what you’re fishing for. Browns dominate the whole canyon, with rainbows mixed in — some wild, some stocked. The upper three miles below the dam grow the larger browns, and a fish in the 14–18 inch range up there is not remarkable. The lower canyon holds more fish and smaller ones on average, with the exception that matters: the deep slots down there hold the browns worth carrying a 6-weight for. So the trade is legible before you park: fewer and bigger up top, more and smaller down low, and the biggest fish of the day most likely to come off a streamer in the bottom end rather than off the technical flat at the top.
The upper canyon, near the dam outlet: wide, shallow, flat. Long riffles, exposed gravel bars, water clear enough to be a problem. This is the technical end of the canyon — dry-fly and fine-nymph water, and comparable in difficulty to Cheesman’s flats even though the wading is easier. Rig it accordingly, which mostly means going longer and thinner than instinct says: a 12-foot leader to 7X is not overkill up here for midge work, and it’s what I’d start with rather than what I’d retreat to. Fish it from downstream, keep the indicator small — on flat clear water a large one drags the drift before the flies have travelled ten feet — and expect to work a single lane properly instead of covering ground. This is also where the canyon’s Trico fishing happens, on that upper flat, for the straightforward reason that spent spinners need slow water to collect on.
The mid-canyon: pocket water and plunge pools. The canyon tightens, the gradient picks up, and the river breaks into slots and drops. This is the easiest fishing in the canyon and the one stretch where a scruffy drift still gets eaten, because broken water hides the leader and gives a fish about half a second to make up its mind. Two things follow from that half-second. First, the flies have to be working from the moment they land. Some of these slots are barely longer than your rod, and a rig that is still sinking when it reaches the tail of one has fished none of it — so put the weight on the point fly, hold the rod high, and work in short controlled passes rather than long drifts. Second, you can get away with a fly that would be laughed at upstream: a high-riding Stimulator or a Chubby Sally on 9-foot 5X, with a #18 Pheasant Tail hung 18 inches off the bend, will carry you through the whole summer down here. It covers the stonefly and the mayfly nymph at once, and in riffled pocket water a light skate on the dry earns takes that a dead drift doesn’t — the fish simply doesn’t have long enough to find the fault in it.
The lower canyon: fast runs, boulders, undercut banks — and weed. By the bottom end the river reads like a freestone. It also holds the slowest, weediest water in the canyon, which makes this the best scud fishing on this stretch of the South Platte. Fish an olive tungsten scud in #14 under an indicator, set to ride eight to ten inches off the bottom, along the inside bends and the slow runs beside the cut banks — then leave it alone. The urge to fiddle with the depth every third drift is the thing that ruins that rig, and I am worse at resisting it than I’d like to admit. The lower canyon is also where the roadside banks go grassy and the current slows enough to give a fish time to commit to something big, which is the whole reason terrestrials work down here and don’t do much up top.
Why it runs cold, and what that does to your calendar
The reservoir above is deep, and the release comes off cold: 38–45°F, year-round. That single fact explains most of this river’s behaviour.
There is no thermally dead month. The midge population is dense enough to carry the calendar on its own, and it hatches in January the same as it does in July. And everything else on the calendar arrives late — the canyon’s hatches run roughly two to three weeks behind Cheesman, because colder water makes slower bugs.
The most useful version of that fact is the Trico one, because it changes your driving rather than your fly box. Tricos here run late — roughly four hours behind the rest of the river, landing between about 11 a.m. and 2 p.m. where the water upstream is finished by half past ten. The cold release delays the whole sequence by roughly two hours. So if the Deckers flats have gone quiet on you at ten in the morning in August, the answer is not to stand there hoping — it’s to drive up and fish the Eleven Mile window, which hasn’t started yet. That’s covered properly in the summer Trico tactics guide, including the section-by-section timing table.
The cold water and the shade off the walls buy the canyon its summer. They don’t cancel it. A release leaving the dam at 40°F is not 40°F six miles down the canyon in July with the sun on it. Carry a thermometer and take the reading at your own feet, not at the dam. My own cutoff and the reasoning behind it are written up separately, and the short version is that I stop at 65°F.
Flows
Flows here come from Colorado DWR, station abbreviation PLAGEOCO. There is no USGS realtime station on the canyon, so the federal gauge map shows nothing here at all.
The working band here is 80–300 CFS, and it is a wading number before it is a fishing one. Inside it the canyon does what it’s supposed to: the pockets hold, the flats are readable, and the fish are spread across three different water types instead of piled into whichever one is left.
The dry-fly window is narrower and sits higher: roughly 150–250 CFS is where surface fishing genuinely opens up here. That matters because this canyon’s typical flow — call it 50–150 — spends most of the year below its own dry-fly ideal while sitting comfortably inside the wading band. A reading of 100 CFS is not a problem and it is not a sweet spot. It means easy wading, concentrated fish, and a nymph day with a narrow surface window rather than the other way round. Which is to say this canyon spends most of its year at a number it is thoroughly good at and never brilliant at — not much of a thing to get excited about on the drive up, and still not enough to keep me from making it.
Under 80 is under the bottom of the band, and it’s a different decision. In late June 2026 this canyon dropped to about 60 CFS and the honest call on this site at the time was to wait. That’s what a number below the band actually means — not that the river is unfishable, but that the fish are compressed into whatever depth exists, they can see everything coming, and the shallow water heats faster once the sun clears the rim. If you go anyway, fish the deep pools below fast water and the soft inside seams, get there early, and accept that presentation is now the entire game.
High water is a pattern change more than a location change. Above roughly 250 CFS the surface fishing falls off — Pat Dorsey’s read on this canyon specifically is that anything over 250 is less than ideal for dry-fly activity, and that matches how it fishes. That’s when the canyon’s rocky substrate earns its keep: this is good stonefly habitat, and heavy nymphs worked into the soft bank seams are what moves fish while the surface is off. Post-rain, when the canyon carries some colour, a worm pattern is worth having — a lighter purple in #16 rather than the loud versions that work on the open valley sections, because even at colour these are canyon fish.
Where the release has been all week tells you as much as this morning’s reading does. As an illustration of how little the season can have to do with it: through the summer of 2026 the weekly reports on this site logged this canyon at 248 CFS in the first week of June, 59 by the end of the month, and then effectively pinned between 94 and 105 for the whole of July and into August. That is a dial, not a snowmelt curve.
The year
Winter (December–February). Midges, and only midges, and this is the canyon’s underrated season. The water is the same temperature it was in August and almost nobody makes the drive in January — which means fish that haven’t spent the week inspecting other people’s size 22s. Work the deep slots and the protected water behind the larger boulders, where trout stack in the cold. A two-nymph midge rig under an indicator is the tool: a bead-head point fly to get down, a #20–22 midge or emerger on a short dropper, and enough weight to be ticking gravel in a slot deeper than you are tall. The take will not pull the indicator under. Cold fish sip, they don’t slash, and a good proportion of winter takes never move an indicator at all — which is the argument for putting it away and fishing a tight line when the water is slow and clear enough to allow it. If you stay with the indicator, watch for the hesitation: it holds a beat while the current keeps moving around it, and if you wait for it to go down properly you’ll set on the fish that ate hardest and miss the rest. Set on the hesitation. What to wear and how to rig for a January day out here is covered in the winter South Platte piece.
One winter caveat that has nothing to do with the fishing: don’t assume the whole canyon road is driveable in January. Confirm the road’s status before you commit to the drive, because the pullout you’re planning on may be on the far side of a gate.
Spring (March–April). The BWOs start, and this is the first month you’ll fish a dry here since the fall. Look for grey afternoons — a bluebird day suppresses the emergence, and the miserable-looking ones produce. Fish a #22–24 Vis-A-Dun or CDC Comparadun to visible rises on the flatter water, and where the fish are working the riffles rather than showing on top, swing a soft-hackle BWO in #18–20 through the current seams instead. That swing is the specific answer to a canyon problem: in broken water the trout intercept the emerger mid-drift rather than rising to the dun, so there is nothing on the surface to cast at even though a hatch is clearly happening. On the swing the take is felt — the line simply stops and loads — and you don’t set so much as let it come tight.
Late May into June. The best all-round window in the canyon, and the one where you can fish three things in a day. PMDs begin in late May and run through mid-June; the tailwater emergence tends to start mid-morning and run through midday rather than at first light, so there is no reason to be standing in the river at dawn for it. Sparkle Duns and Parachute PMDs in #18–20, fished to rises on the upper flat. Which of the two you tie on is a question the rise answers, not the fly box: a quiet sip where the head barely breaks, or a slow head-and-tail roll with the dorsal showing and no splash, is a fish eating emergers stuck in the film, and that is the Sparkle Dun. A confident rise that leaves a clean ring around a taken dun is the Parachute. Most PMD rises that look like dun takes are emerger takes, so if you’re guessing, guess Sparkle Dun. And when you’re getting refusals on a drift you know was clean, go from 6X to 7X before you change the pattern — the tippet is the more common fault. Late May is also the Yellow Sally window, and it’s the one time I’d tell you to fish a #14 dry in this canyon with a straight face — I’ve had genuine surface takes on sallies here in late May at the right flow, in the same weeks that Deckers and Cheesman were still marginal. The stonefly guide covers the nymph side of that window, which is what carries you when the surface isn’t happening.
Caddis then ramp up through June and take over the evenings — Elk Hair Caddis in #14–16 and a Sparkle Pupa in #14, fished in the faster riffle sections, with the last hour of light being the hour that matters. Caddis are the one hatch here that forgives you: the adults skitter as they emerge, so a fly that drags slightly is often the fly that gets eaten, and a deliberate twitch is a legitimate move rather than a mistake. Read the rises the same way you read the PMDs, but with the opposite conclusion — a splashy crash is a fish chasing an adult across the top and wants the Elk Hair; a soft sip near the bank is a cripple stuck in the film and wants the pupa fished in the surface. The failure mode in a good caddis evening is not the pattern. It is casting at all of it. Pick one rising fish, catch it, then pick the next one; I have burned entire evenings firing at the whole river and landing nothing.
High summer (July–August). Three separate fisheries in one day, in this order. Tricos from about 11 to 2 on the upper flat — #18–22 spinners on the finest tippet you’ll accept, and get that tippet on before you leave the truck. A fish eating spent spinners barely dents the surface, and the three hours you get here are too few to spend threading 7X in the middle of them. Look up before you look at the water: the spinners swarm in columns over the bankside vegetation first, and when you see that cloud you have twenty to thirty minutes before anything lands on the river — which is exactly enough time to get into position above the fish and cast down to them rather than up. Position upstream and present down-and-across so the fly reaches the trout ahead of the tippet. And take the visible fly over the correct one. If you cannot see your spinner at thirty feet on glassy water you cannot control the drift and you will not see the take, so put on the parachute-post version and accept the slightly worse profile. The best pattern you can’t track is worse than the second-best pattern you can follow all the way in.
Caddis in the evenings on the faster water. And terrestrials in the middle, in the lower canyon, where the grassy roadside banks are the whole point: put an ant, a beetle or a hopper against the grass line — inches off it, not the comfortable arm’s length out — mend the moment it lands, and count on losing flies to the grass. The canyon-specific part is what to do with a refusal, because down here you are usually working a bank you can see the whole of and a fish that has already declined once. Go smaller, not louder. The instinct after a refusal is a bigger, brighter foam bug; on this river it is a #16 ant on the very next cast, and it works often enough that I now reach for it before I reach for anything else. The heat matters less here than on the open sections because of the shade and the cold release, but see the thermometer note above — less does not mean not at all.
Autumn (September–October). This is the season I’d pick if I only got one, and my favourite reason to make the drive. The mid-canyon — call it miles two through five below the dam — is one of the strongest fall BWO stretches anywhere on the South Platte, because the walls and the cold water hold the conditions BWOs want for longer. On an overcast day the morning activity here outlasts what you’d get at Deckers, and you’ll share it with fewer people than either Cheesman or Deckers in October. Fish a #22 dry to working fish, and let the rise tell you whether to keep it there: a confident rise that shows the fish’s back, or a clean ring closing over a taken dun, means they’re up on adults and the dry is right. A soft, barely-there dimple that leaves a bubble means they’re eating emergers in the film and the dry will keep getting refused no matter how well you drift it. That’s the moment to hang an emerger under it rather than change the dry.
Two more things that matter more here than the fly does: fish settle into a rhythm — a rise every eight to twelve seconds — so land the fly so it arrives on the beat rather than in the lull. And don’t fish this one like a dawn hatch and leave at noon — a fall BWO window opens late and this canyon’s runs later still, so the hours most people have already driven home from are the hours to be standing in it. Leader construction and how to read the rises are in the autumn BWO write-up. And through October the browns go pre-spawn and the streamer fishing steps up sharply, which is the next section.
November. Back to midges, and the canyon empties out. It is the same rig as the winter paragraph above and there is no cleverness to add to it. The one November-specific thing is underfoot rather than in the fly box: brown trout spawn through October and November, and this canyon’s pool tailouts are where they do it. So walk the bank instead of the streambed for a few weeks, and give any patch of bottom that looks freshly swept and paler than everything around it a wide berth — including the water upstream of it, because silt you kick loose settles downstream. If you’re not sure, treat it as though you are. Then fish an egg pattern through the run below that gravel, where the rainbows are waiting on what washes free. That is the productive answer and the decent one at the same time, which does not happen often enough to pass up.
Streamers, which is what this canyon is actually for
Every reach on this river will produce on a streamer some of the time. This one is a streamer destination in a way Cheesman and Deckers are not. Bring the big flies, and bring the rod that throws them.
The reason is the water and the fish it grows. Cold, well-fed browns, a lower canyon full of deep slots, undercut banks and boulders, and enough bank structure to work systematically. These fish will eat a streamer in gin-clear conditions — they don’t need off-colour water — though some turbidity after rain helps. The conditions to plan around are overcast skies and low light: morning and evening, and any grey day in between.
How to fish it. Not dead-drift. Cast across and slightly downstream, let the fly swing down through the current, then strip it back in six-inch pulls. You are covering water and provoking a decision, not presenting a mayfly. Work the bankside structure specifically — the undercuts, the submerged wood, and the shadowed downstream face of the boulders — rather than the middle of the run, because that’s where a fish that eats a four-inch fly is sitting. The takes are unambiguous — there is nothing to interpret. Keep stripping until you feel weight, then keep the rod low and pull rather than lifting.
What to throw. Woolly Buggers in #8–10 in olive, black and brown for the general case. A Sculpzilla in #6, tan or rust. Double bunnies and articulated patterns for the big browns in the deep lower-canyon slots — the flies here can run larger than anything you’d sensibly show a Cheesman fish. Rust and brown are underused and worth carrying deliberately: this canyon holds crayfish in the margins, and a rust pattern swung slowly through a slow pool in September or October reads as one. Which is a long way of saying that the two colours you walk straight past in the bins are the two worth buying.
One October caveat, and it is not optional. The reason the streamer fishing sharpens in autumn is that the browns are staging to spawn, and by late October some of them have moved onto the gravel to get on with it. Fish the deep runs and drop-offs beside that gravel and not across it. A paired-up fish sitting over pale cobble and ignoring everything you show it is not being difficult; it is busy, and it gets left alone. The staging males in the run below are the trophy game, they are fair, and they will eat harder than anything else in the canyon all year.
A 5-weight will throw a Woolly Bugger; it will not comfortably throw an articulated fly into canyon wind all afternoon. Step up to a 6-weight for this, and if you intend to get down into the deepest lower-canyon slots, the sink tips and heavier rigs are laid out in my autumn streamer piece.
Wading, and the road
The wading here is easier than Cheesman and harder than it looks from a pullout. Several of the better beats hold chest-deep slots, so this is full chest waders rather than hip boots — waist-highs will leave you standing on the bank looking at the best water in front of you. The substrate is rocky, uneven and genuinely sharp in places; reinforced knees are not a marketing feature here, and a wading staff earns its place for everybody, not just for the people who normally carry one. Felt or rubber both work. Boots, not sandals.
The access is casual. Two things here are not.
The first is temperature. The convenience of a roadside canyon makes it very easy to talk yourself into wet-wading early in the season, and this is not the water for it — the release is 38–45°F in April the same as in August, and cold that constant is what makes the fishing good and the wading a hypothermia question. Waders in the early season, every time.
The second is the road itself. You are stepping out of a vehicle onto a canyon road that other vehicles are using, often around blind bends, and you’re doing it while carrying a nine-foot rod and looking at the river instead of at traffic. Park fully off the road, get your gear on where you’re visible, and cross with the same care you’d use anywhere else. It is the one hazard here that has nothing to do with the river, and the one a roadside canyon quietly normalises.
Regulations
The canyon is not one regulation, and this is the thing to get right before you get out of the truck.
The top 3.8 miles are designated Quality Waters — catch-and-release, artificial flies and lures only. That segment runs from the Eleven Mile Reservoir dam downstream to the Wagon Tongue Gulch Road bridge at Spring Gulch. Below that bridge the river reverts to standard Colorado statewide regulations. So the strictest water in the canyon is also the water nearest the dam — the same water that fills first on a weekend morning, and the same water most people fish because it’s the first thing they reach.
The regulation changes before the river does. That boundary sits inside the productive six miles instead of at the edge of them, and the drive-and-scout habit this canyon rewards is exactly the habit that carries you across a reg line without noticing you did.
This one is easier to get right than it sounds, because unlike most reach boundaries on this river it is a thing you can look at. Downstream at Deckers the change between two sets of rules happens at an unmarked property line, so you cross it without being told. Here it is a road bridge with a name on it, and you drive over it. So the check is a simple one and it happens in the vehicle, not on the water: note the Wagon Tongue Gulch Road bridge at Spring Gulch on the way down, and know whether the pullout you have chosen is above it or below it before you put waders on. Above the bridge, fish it as catch-and-release with artificials — every fish goes back, no exceptions and no bag. Below it you are on statewide rules. Don’t reason from what was legal at the last pullout, and if you genuinely cannot work out which side you are on, fish it as though it’s the strict side. That mistake costs you nothing.
What the canyon does not have is the private-water patchwork that complicates Deckers — the water along CR 96 is public, though private inholdings exist near the canyon and posting is worth reading.
Regulations are revised annually and the reach boundaries genuinely matter on this river, so treat this as orientation rather than authority. The signage at the access points and the current CPW brochure are what settle the rules — and what it costs to get in.
The box
There is nothing unusual in this list. The canyon’s demand is only that you carry a wider range than the other reaches, because a day here can want three different things.
- Midges, #20–24 — every month of the year, and the whole of winter. Griffith’s Gnat in #20–24 on top, Mercury and Palomino Midges in #22 underneath.
- BWO dries, #22–24 — Vis-A-Dun and CDC Comparadun, spring and autumn, for grey afternoons.
- Soft-hackle BWO, #18–20 — partridge and olive, swung through the riffle seams when a hatch is on and nothing is rising.
- PMDs, #18–20 — Sparkle Dun and Parachute PMD, late May into mid-June.
- Caddis, #14–16 — Elk Hair Caddis and a Sparkle Pupa in #14, June evenings.
- Trico spinners, #18–22 — the upper flat, mid-July to late September, late morning.
- Yellow Sally, #14 — a high-riding Stimulator or Chubby Sally for the mid-canyon pocket water in late May, with a #18 Pheasant Tail hung off the bend.
- Terrestrials, #12–16 — ants, beetles and hoppers, lower canyon, tight to the grassy banks.
- Olive scud, #14, tungsten — the weedy lower-canyon runs, and one of the genuinely distinctive flies for this reach.
- Streamers — Woolly Bugger #8–10, Sculpzilla #6, and something articulated for the deep slots.
- Egg pattern — October and November only, drifted through the run below spawning gravel and never over it.
On tippet: 9-foot 5X is the working default for most of the dry-fly work, 6X to 7X on the technical upper flat, and 4X–5X when you’re throwing terrestrials or streamers, because a fish eating something large is not inspecting your leader. For nymphing the full indicator rig is written up separately — the canyon adjustment to it is a smaller indicator and shorter drifts than you’d fish on an open flat, because the current here is complex enough that your drift is honest for a few feet and then it isn’t.
Rods: a 9-foot 5-weight for the dries and nymphs, a 6-weight for the streamers. And a note from fishing the tight slots down here — the casting room is often terrible. Twenty-five feet, nothing behind you, and a short compressed stroke. A rod that only comes alive at distance is the wrong rod for this canyon.
Where the canyon fits
Set it beside the others and the label writes itself. Cheesman asks for precision, Deckers asks for nothing much, the Dream Stream asks you to stay out of sight. Eleven Mile asks for range — the reach where one day can genuinely run midges at first light, a BWO window if the clouds cooperate, and a streamer swung at dusk on the way out. No other stretch of this river hands you that menu as reliably, and it’s the section I’d fish if I were trying to cover several techniques in a single trip rather than get good at one.
It is also the most forgiving. Not because the fish are easy — the upper flat is as technical as anything on the system — but because you can drive away from a problem here. Too many people at the pullout, wrong flow, wrong light: get back in the truck and try a different mile. That option doesn’t exist on hike-in water, and it’s worth more than it sounds.
The complete Eleven Mile Canyon guide has the access, beat and gear detail at length. But the road is not a shortcut to the fishing. It’s a scouting tool, and the people who use it that way — driving past the obvious water, walking two hundred yards from wherever they end up — fish a different canyon from the people who park at the first pullout with cars in it.
Common questions
- Is there a fee to fish Eleven Mile Canyon?
- Yes. Eleven dollars per vehicle, collected at the Forest Service entrance station at the mouth of the canyon, or $100 for an annual pass to this site if you are going to be up here more than nine times a year. A bus or van of ten or more is $25. It is a Forest Service fee, so a Colorado State Parks pass does not cover it — that pass is for Eleven Mile State Park, the reservoir above the dam, and a different gate. The booth has historically been cash-only.
- Where does the catch-and-release water end?
- At the Wagon Tongue Gulch Road bridge at Spring Gulch, 3.8 miles below the dam. Above the bridge it is catch-and-release with artificials, every fish back, no bag. Below it you are on statewide rules. Unlike the unmarked property line at Deckers, this boundary is a road bridge with a name on it that you drive over, so note it on the way down and know which side your pullout is on before the waders go on. If you genuinely cannot work it out, fish it as though it is the strict side — that mistake costs you nothing.
- Can you drive right to the water?
- For the productive upper six miles, effectively yes. CR 96 runs beside the river, so you can look at a run through the windscreen, decide against it, and be looking at the next one ninety seconds later. Drive past the first busy pullout on principle.
- Is the canyon road open in winter?
- Do not assume it is. Confirm the road's status before you commit to the drive in January, because the pullout you are counting on may sit behind a gate. The fishing itself is one of the canyon's underrated seasons — the water is the same temperature it was in August.
- Is Eleven Mile Canyon good with children?
- It is the reach on this river where the distance between parked and fishing is whatever you decide to make it that morning, which is the whole reason I hike into this canyon in the summer with my son. Everything else on the South Platte makes you choose something first.
- Is it crowded?
- Less than you would expect from a road. A road does not concentrate a crowd, it distributes one — anglers peel off at pullouts along eleven miles of river instead of fanning out from a single trail junction. In practice it is less crowded than Deckers on a weekend and less crowded than Cheesman midweek.
