Snake River Fishing Report
Week of April 20, 2026 — April 26, 2026
Current Conditions
Controlled release out of Jackson Lake Dam is holding near 270 cfs — ice-clear water, cool temps, and excellent wade access. This reach is fishing as a classic low-flow tailwater: small nymphs, midge clusters, and slow seams. Float traffic is minimal. Below Pacific Creek, tributary inflow builds flows to 1,480 cfs at the Moose gauge with five feet of visibility. This is prime float territory — banks, inside seams, and soft tailouts are all in play. Skwala dry-droppers and BWO emerger rigs are the primary setups.
Expect flows in the 1,500–1,600 cfs range through this reach with Gros Ventre and Flat Creek adding minor inflow. Wadeability is still workable at access points, though drift boats are the better tool. Tributary color is not yet a factor given the low snowpack and the cold Wed–Thu forecast. Dry-dropper rigs move fish along inside seams and soft tailouts; switch to a single CDC Comparadun BWO on overcast afternoons when risers show in the foam lines.
Hoback confluence adds volume, but with this year's snowpack profile expect the Hoback to stay relatively clean until a warm-up event. Flows workable for full-day floats. Early-week warmth (Mon–Tue, 69–72°F) could nudge a short pulse of color in tributaries; the Wed–Thu cold snap will reset clarity. Below the Hoback the fishery is float-only — expect a solid BWO window mid-week as the system cools down, with Skwalas still in the mix on warmer afternoons.
What's Hatching
Blue-Wing Olives (Baetis)
Heavy11 AM — 3 PM, strongest on overcast days
Building and trending heavy. Wednesday and Thursday's forecast (47–53°F highs, showers, possible snow) is textbook BWO weather — this will be the strongest emergence window of the week. Fish the foam lines and back eddies where duns collect; emergers in the film outfish fully emerged duns when fish get picky. Sizes 18–20.
Skwala Stoneflies
Moderate1 PM — 4 PM on warm afternoons
In the middle of the peak window (late March through early May). Stones are crawling off bank rocks and cobble bars as water temps push into the mid-40s°F. Cruise the banks with a size 8–10 dry tight to willows — takes can be violent. Strongest in the Moose-to-Alpine reaches on warm afternoons.
Midges
Moderate10 AM — 1 PM, slow seams and tailouts
Year-round on the Snake but steady and fishable now in slow seams and tailouts. Best concentration mid-day. The transition from midges to BWOs around midday creates a sustained feeding window — fish often switch without pausing. Sizes 18–22.
What's Producing
Dry Flies
The primary Skwala imitation and top of a dry-dropper rig this week. Fish tight to willowed banks; cast upstream and dead-drift along the edge. Pair with a #18 Pheasant Tail on 24–30" of 4X as the dropper.
The money fly for overcast Wed/Thu. Fish it single on 5X to risers in seams and tailouts. The CDC wing floats in the film like a natural emerger — sits perfectly for committed Baetis risers.
Searching pattern and BWO imitator. High-visibility wing post makes it the right choice on gusty mid-week days when sight-tracking a low-profile CDC pattern is tough.
Nymphs & Droppers
Primary Skwala nymph and general-purpose stonefly. Double-nymph it with a #18 Juju Baetis dropper under an indicator through deeper runs and bucket water. Black or brown both producing.
The BWO nymph of choice. Fish as a dropper under the Skwala Stimulator in a dry-dropper rig, or as the trailer in a double-nymph indicator setup. Flash-back versions are outperforming the standard.
The top producer in the dam tailwater. Fish shallow under an indicator in slow water, or as the bottom fly in a two-nymph rig. Red has been marginally better than black in clear water.
Best Time and Section This Week
Next Week's Outlook
Flows at Moose will likely continue falling into next week as the Wed–Thu cold snap stalls snowmelt, then rebound modestly as Friday–Sunday warms back into the 50s and 60s. The controlled release below Jackson Lake Dam will remain low given the 60%-of-median snowpack. BWOs will intensify through the cold mid-week window and carry into early next week. Skwalas will stay in play for the next 10–14 days before tapering. Midges remain a constant. With snowpack at a record-low pace and meltout running 30+ days early at some stations, expect the pre-runoff window to compress — the clean water and wadeable flows of right now are the best conditions anglers will see until late summer. Caddis, PMDs, and salmonflies are still 2–4+ weeks out.
Conservation Note
Water temperatures remain in the cool 40s°F this week, so heat stress is not a concern. No brown trout spawn is active (fall only). The real conservation story this spring is the compressed window created by record-low snowpack — angler pressure will concentrate on a narrower band of prime flows, and native Snake River fine-spotted cutthroat will see more hands than in an average year. Please: barbless hooks, keep fish in the water, wet hands before handling, and keep fights short on the 4X–5X tackle these hatches demand. Spawning cutthroat are active in shallow gravel tailouts in some side channels now through June — give obvious redd beds a wide berth.
The Snake is fishing in classic pre-runoff spring form, but the window is compressed this year. Flows at Moose are falling to 1,480 cfs, the controlled release below Jackson Lake Dam is holding near 270 cfs, and Snake River Basin snowpack is sitting at 60% of median. Statewide snowpack peaked 29 days early and meltout is running weeks ahead at most stations. Translation: we are in the sweet spot right now — clear water, moderate wadeable flows, and the spring hatch sequence is firing — but anglers should plan to hit this window in the next two to three weeks before tributaries push color and flows climb.
Midges are steady, Skwala stoneflies are in the middle of their run, and Blue-Wing Olives are building — with Wednesday and Thursday’s cool, overcast weather setting up as the strongest BWO days of the week. Confidence in the dry-dropper game is high. If you can only pick one day, make it Wednesday or Thursday; if you can only pick one rig, make it a Skwala Stimulator #10 with a #18 Pheasant Tail dropper.
Common Questions This Week
Is the Snake wadeable this week?
Yes. The Dam-to-Pacific Creek tailwater is fully wadeable at ~270 cfs. The Moose reach is wadeable at access points at 1,480 cfs, but drift boats are the better tool below Pacific Creek. Water clarity is excellent throughout — roughly five feet of visibility.
What should I tie on first?
A Skwala Stimulator #10 with a #18 Pheasant Tail dropper on 24–30" of 4X. On cold overcast afternoons (Wed/Thu), switch to a single CDC Comparadun BWO #18 on 5X to rising fish.
How is the snowpack affecting this year's season?
The Snake River Basin is at 60% of median SWE, and statewide snowpack peaked 29 days early. The practical impact: runoff will start earlier and be less severe, the pre-runoff window is happening right now, and summer baseflows will likely be lower than average. Book now for the clean-water spring window.
When will the salmonfly, golden stone, and caddis hatches start?
Not this week and not within the two-week horizon. These are later-spring and early-summer hatches on the Snake — expect caddis to be the first of the group, typically late April into early May if temps stay on pace.
Wade trip or float trip for this week?
Float the Pacific Creek–Moose reach if you want the widest hatch overlap and best dry-fly action. Wade the Dam tailwater if you want technical midge and BWO fishing in clear, slow water. Both are fishing exceptionally well — the choice comes down to style.
The pre-runoff window is open and short. Clear water, wadeable flows, and three active hatches — book a guided trip this week to hit the best dry-fly conditions of the spring.
