Snake River Fishing Report
Week of May 3, 2026 — May 9, 2026
Current Conditions
Teton Troutfitters guides the South Park to Alpine reach. Upriver conditions shown for reference.
Exceptionally low and clean. The Jackson Lake Dam release is holding at a controlled 273 cfs, creating ice-clear tailwater conditions with visibility exceeding 6 feet — ideal for technical sight-fishing with small patterns. Wadeability is excellent across the entire reach. Focus on the deeper winter lies where trout remain staged, especially the slower seams and back eddies where midges concentrate. The lack of tributary input makes this the most stable section of the river — your reliable fallback if the lower reaches color up from mid-elevation melt.
Holding at 1,440 cfs, supplemented by the Gros Ventre at 436 cfs. Clarity is good at approximately 5 feet but can fluctuate in the afternoon as warmer air temperatures accelerate melt in the Gros Ventre Range. Wadeability is manageable, though the braided character favors float fishing to cover more water and access the soft side channels where trout are stacked on midges and BWOs. This reach is currently holding the highest density of feeding fish, particularly along inside seams and foam lines. If you only get one section, this is where the surface game is best.
The most exposed reach to early runoff. Estimated flow in the Snake River Canyon is 3,130 cfs, with the Hoback contributing 598 cfs and introducing the first signs of spring turbidity. Visibility is fair (3–4 feet) and expected to drop as the week progresses. Wadeability is difficult to dangerous due to high water velocity and limited bank access — float-only. Target the larger brown trout population in the canyon with streamers and heavy nymph rigs in the deeper ledge-rock troughs.
What's Hatching
Blue-Wing Olives (Baetis)
Heavy11 AM — 3 PM, strongest on overcast days
The headline hatch this week. Emerging predominantly on cool, overcast days when high humidity prevents wings from drying quickly, extending surface drift and giving trout a longer window on each insect. Surface action in the braids below Moose is as good as it gets right now. Sizes 18–22.
Midges (Chironomidae)
Heavy10 AM — 1 PM
Consistent cold-water emergence triggered by solar radiation and photoperiod. Fish key on pupae in foam lines and slow tailouts. The midge-to-BWO transition through midday creates a sustained feeding window — fish often switch from midge pupae to Baetis emergers without pausing.
Skwala Stoneflies
Light1 PM — 4 PM on warm afternoons
Tapering. Adults are still crawling to the banks to mate, but the hatch is running its course as water temps rise out of the prime emergence window. If you want to throw size 8–10 foam dries to cutthroats, this is the final week — fish tight to the willows on the warmest afternoons.
March Browns
Sporadic12 PM — 3 PM
Larger mayflies starting to appear in riffles as water temperatures stabilize above 43°F. Sporadic right now but watch for the first reliable showings later in the week, especially in the faster water of Reach 2. A #14 Parachute Adams covers them.
Caddis
Sporadic1 PM — 4:30 PM
Early Brachycentrus species are beginning to show in lower sections — the first caddis of the season. Trout are keying on afternoon emergers more than fully emerged adults. Sizes 16–18. Swing a Soft Hackle through riffle tails when you see fish swirling without taking visible duns.
What's Producing
Dry Flies
The money fly this week. Fish single on 5X to risers during peak BWO emergence. CDC wing sits in the film like a natural emerger — perfect for committed Baetis risers in foam lines and tailouts.
For the tail end of the Skwala window. Fish tight to the banks on warm afternoons — strikes can still come from cutthroats holding inside seams waiting for the last of the migrating adults. Last call on this rig for the season.
The most effective pattern for midge clusters in slow seams and tailouts. When you see clusters forming on the surface in the braided side channels, this is the right call.
Nymphs & Droppers
Anchor fly for deep-nymphing rigs or as a dropper below a large Skwala dry. Still producing as Skwala nymphs continue migrating to the banks; black or brown both working.
Highly effective as a point fly or trailing dropper to reach fish in moderate-speed water. Imitates the active Baetis nymphs ascending through the column right before emergence.
Streamers
For Reach 3 in the canyon. Fish deep and slow with long pauses along undercut banks and ledge-rock troughs — the larger brown trout in this reach are keyed on baitfish profiles in the off-color water.
Best Time and Section This Week
Next Week's Outlook
Flows are predicted to rise significantly next week as a warming trend and mid-week showers accelerate snowmelt. Expect water clarity to diminish first in Reach 3 below the Hoback and eventually in Reach 2 as the Gros Ventre begins its spring surge. BWO activity will likely remain strong through the transition, but the window for clear-water dry-fly fishing is narrowing rapidly. Booking urgency is high for anyone wanting to avoid the true 8-week runoff phase that typically begins in mid-May.
Conservation Note
Rainbow trout are at the peak of their spawning cycle (April through mid-May) — avoid wading shallow gravel riffles and give obvious redds a wide berth to protect the next generation. Native Snake River fine-spotted cutthroat are preparing to spawn in June and are highly susceptible to stress now during the pre-runoff feeding binge. Use barbless hooks, keep fish in the water during handling, wet hands before any contact, and keep fights short on the 4X–5X tackle these hatches demand. Stay off the redds.
The Snake is fishing the last stable week before runoff. Flows at Moose are holding at 1,440 cfs, the controlled release below Jackson Lake Dam is ice-clear at 273 cfs, and water temperatures are now in the 43–47°F range through the early afternoon thermal peak. That temperature window is where the BWO machine turns on, and on overcast days the braids below Moose are producing as good a Baetis hatch as we see all year.
The complication is the snowpack picture. The basin is at 61% of median snow water equivalent but 107% of normal year-to-date precipitation — most of our moisture this winter fell as rain or melted in mid-season, leaving a flashy snowpack ready to move as soon as nighttime lows stop dropping below freezing. The Skwala hatch is tapering, March Browns and the first caddis are beginning to show, and Reach 3 in the canyon is already pushing past 3,100 cfs with some color from the Hoback. If you want clear water and big-bug dry-fly fishing in the same trip, this is the last clean week to do it.
Common Questions This Week
Is the river currently safe for walk-and-wade fishing?
Yes — particularly in Reach 1 and Reach 2, where flows are well below 1,500 cfs. Reach 1 below the dam is wadeable across the entire section. The lower canyon (Reach 3) is flowing over 3,000 cfs with limited bank access and is currently float-only.
Which hatch should I prioritize if I only have one afternoon to fish?
The Blue-Wing Olive hatch is the dominant event this week. Focus your efforts between 11 AM and 3 PM, especially if you see overcast conditions — those skies trigger the heaviest emergences. Tie on a CDC Comparadun BWO #18 on 5X and target risers in foam lines and tailouts.
How will the forecasted mid-week rain affect water clarity?
Mid-week showers may introduce localized turbidity, particularly below major tributaries like the Hoback and Gros Ventre. If clarity drops in the lower river, move up to the tailwater section below Jackson Lake Dam — that reach remains ice-clear regardless of localized precipitation, since the reservoir acts as a sediment settling basin.
This is the last clean week before runoff. Heavy BWO hatches, ice-clear tailwater, and a closing window on Skwala dries. Once nighttime lows stop dropping below freezing, the high-elevation snow moves fast — book this week to fish the Snake before it goes big and brown.
