Eleven Mile Canyon Hatch Report — October 10, 2026

Flow is Low; Fish Tight to Cover

We’re sitting at 69 CFS this week, which is notably below Eleven Mile’s typical 50–150 range and well south of the ideal dry-fly zone (150–250 CFS). That’s lean water, and it means two things right now: the fish are concentrated and spooky, and the holding water that matters is very specific. You can’t afford to cover ground looking for cruisers. Every cast needs to land in a pocket, behind a boulder, or in the deeper slots—the only places where trout feel safe at this flow.

The upside is that low water does make pocket water fish aggressive. They know their real estate is scarce, and they’re competing harder. The downside is that they’ll also spook if your shadow crosses them or your leader lands hard. At 56°F, the fish aren’t sluggish yet, but they’re starting to shift into fall mode—more alert, shorter feeding windows, less forgiving of sloppy casts.

Midges and Fall BWOs Rule; Fish Them Small and Deep

October on Eleven Mile tailwater means two things: midges (your workhorse year-round), and the fall blue-winged olive hatch in #20–22. The BWO is your ticket to dry-fly time on gray days—it typically appears mid-morning through early afternoon when cloud cover dominates. Tie in #20–22 CDC-wing versions; they float low and work in moderate currents and calm pockets alike.

But here’s the real talk: at 69 CFS, most of your fishing won’t be dry. The midge nymph is the bread-and-butter, and you need to fish it deep and tight. Black Beauty, Mercury Midge, and zebra midge patterns in #22–24 will account for most of your takes. The emerger phase—especially a small #22 RS2—is also firing, particularly in the morning and late afternoon when the sun angle is low.

The water is clear at this flow, so small matters more than at higher volumes. Tie smaller than you’d expect. A #22 midge nymph may feel impossibly fine, but it’s the right call. A #24 emerger is not overkill.

The Rig for Low Water

Your best setup this week is a tight-line or indicator-and-dropper combo depending on the depth of the pocket you’re fishing.

For the deeper slots (the kind you encounter frequently along the canyon road, where the river narrows or pools):

• Use a small split-shot weight anchor—a single #6 or #7 shot about 18 inches up the leader—or swap to a tiny tungsten nymph (#18–20 Czech-style) as your point fly.
• Tie a #22 midge emerger or small #20 olive nymph 14–18 inches below that anchor on a short piece of 4X tippet.
• Fish this with a long, slack leader and let it dead-drift into the seam. At 69 CFS, you want to feel the nymph ticking bottom, not bouncing wildly.

For shallower, faster pocket water (the riffle-run transitions):

• Drop the weight or skip it entirely. Fish a single #22 midge nymph on 5X tippet, cast upstream, and high-stick it through the pocket. The reduced weight and fine tippet cut through the low flow without dragging.

Indicator fishing also works if you want to cover softer water: a small yarn indicator 4–5 feet up, with your midge nymph on 5X tippet and a single #7 split-shot about 18 inches above the fly. Set the depth for 1.5× the water depth in pocket water; 2–3 feet in the genuine holes.

For dry-fly opportunities (gray-sky mornings when the BWO starts to show), tie a #20–22 CDC or comparadun BWO with a midge emerger or small black midge hanging 18 inches below on a dropper. The dun pattern draws attention and teaches the fish to look up; the subsurface fly does the real work.

Use 5X tippet across the board. At this flow, you don’t need the heavy stuff, and 5X turns over small flies better and lands them softer than 4X.

Where to Spend Your Time

The 3.8-mile quality-water segment—from the dam down to Wagon Tongue Gulch Road—is your only option, and every bit of it fishes. But at 69 CFS, be selective about how you fish it.

The deep, dark pools directly below the dam are money. Water this slow concentrates fish, and the long, consistent depths mean your nymph rig can stay in the zone longer. Work the edges and any current seam; don’t rush.

The pocket water scattered throughout the middle and lower canyon—the stuff you see from the pullouts along the old railway roadbed—is where the dry-fly action lives on overcast days. Focus on pockets with 12–20 inches of depth and a boulder or bank-side obstruction. A single #20 BWO cast upstream of the obstruction will often draw a rise within three drifts.

The faster runs feel barren at this flow; most trout have retreated to the deeper pockets and pools. Skip the shallow riffles unless you’re specifically sight-fishing to a nose or a fin.

Access and Stewardship

The $11 day-use fee at the entrance station is a Forest Service gate, not a state-parks entry—bring cash or a card. Parking at pullouts along the canyon road is plentiful and family-friendly, but with low water and clear conditions, keep your footsteps light. Fish are spooky at 69 CFS. Wade slowly, stay low, and let your rod do the talking rather than your waders.

At 56°F the water is cold enough that fish are relatively stress-tolerant, but fall is when they’re funneling energy into pre-spawn behavior. Practice catch-and-release carefully: wet your hands, keep the fight short, and return them quickly. These fish need every calorie.