Snake River Fishing Report
Week of May 24, 2026 — May 31, 2026
Current Conditions
Teton Troutfitters guides the South Park to Alpine reach. Upriver conditions shown for reference.
The controlled release from Jackson Lake Dam is holding at a steady 2,140 CFS, though flows build rapidly downstream to 4,010 CFS near Moran and 6,470 CFS at Moose due to heavy unmanaged tributary inputs from Pacific Creek and the Buffalo Fork. Water clarity remains exceptional right below the dam with over six feet of visibility, tapering to three to four feet as tributaries enter. Wadeability is good to restricted directly below the dam but becomes highly difficult and hazardous approaching Moose. Cutthroat trout are actively staging in slower seams, back eddies, and soft water behind mid-river boulders to feed on consistent midday hatches. Conditions heavily favor floating, though technical wading remains viable near the dam.
Flows are holding at 6,470 CFS and rising rapidly, with water clarity averaging a fair two to three feet of visibility as early snowmelt and sediment enter from the Gros Ventre River and Flat Creek. Wadeability is poor and highly hazardous due to the heavy volume, swift current, and shifting gravel in the braided channels. Drift-boat anglers must focus presentations on grassy cut banks, slow braided seams, and the calm water behind structure where cutthroats seek refuge from the heavy main current. Wading should be avoided entirely due to safety concerns.
The lower reach is surging past 7,330 to 8,630+ CFS as the Hoback River and other low-elevation tributaries contribute massive volumes of turbid snowmelt. Water clarity is muddy and off-color, dropping below one foot of visibility. Wadeability is extremely dangerous — this section is effectively unfishable on foot. Viable tactics are limited to stripping large, dark streamers or drifting heavy stonefly nymphs along the extreme inside edges and slow bank eddies where large brown trout seek refuge. Only experienced drift-boat operators should attempt this section; conditions are borderline blown-out.
What's Hatching
Blue-Wing Olives (Baetis)
Moderate10 AM – 3 PM
Triggered by cool water temperatures (42–48°F) and low-light conditions. Overcast, drizzly, or humid days prompt coordinated emergences in slow tailwater seams. The midday BWO hatches on overcast days have been spectacular this week, with cutthroat rising eagerly in slow, glassy eddies. Sizes 18–22.
Midges (Chironomidae)
Moderate9 AM – 11 AM & late afternoon
Heavily concentrated in spring. Peak emergence triggered by stable morning water temperatures (38–42°F) and consistent photoperiods. Fish key on pupae in foam lines and slow tailouts. The midge-to-BWO transition through midday creates a sustained feeding window.
Caddis (Grannoms)
Sporadic4 PM – 8 PM
Triggered by late-afternoon water warming above 48°F and expanding daylight. Early caddis flutter near the banks as afternoon temperatures peak. Still sporadic but building toward the June caddis blitz.
Salmonfly (Giant Stonefly)
SporadicNot yet active — within 2 weeks
Subsurface nymphs are actively migrating toward the banks, prepping for the early June crawl as water temps approach 50–54°F. Not hatching yet, but heavy stonefly nymph patterns are producing well as naturals move toward shore.
What's Producing
Dry Flies
The premier dry fly for overcast BWO emergences. Fish on a long, fine 12-to-15-foot leader tapered to 5X–6X in slow seams and back eddies.
Designed for late-afternoon and evening caddis activity. Skate or dead-drift in the surface film along slower bank lines.
High-buoyancy attractor. Fish close to grassy banks or use as a dry indicator to suspend heavy nymphs in a dry-dropper rig.
Nymphs & Droppers
A heavy stonefly nymph that serves as an excellent anchor. Bounce along the bottom in deep runs and off-color water to target deep cutthroats.
A highly versatile, fast-sinking attractor nymph. Perfect as a point fly in deeper runs or in the slightly turbid water below Moose.
Highly realistic early stonefly nymph. Dead-drift through deep, broken riffles and rocky runs as Salmonfly nymphs migrate toward the banks.
Essential subsurface BWO imitation. Best fished on a tight-line or Euro-style rig through the deep, clear seams of the upper tailwater.
Dominant midge pupa pattern. Dead-drift in back eddies and slow tailouts where midges naturally concentrate.
Streamers
The go-to for off-color water. Swing and strip aggressively along grassy cut banks and behind boulders to trigger big browns in the lower reaches.
Best on high-volume, overcast afternoons in turbid water. Slow-strip through deep pools and soft inside seams where big fish hold.
Emergers
Highly effective in the surface film on overcast days. Present drag-free to trout actively sipping just below the surface.
Slim, sparse hybrid nymph/emerger. Suited for the clear Dam-to-Moose reach where trout have a long look at the fly.
Features a slim profile and dark wing pad. Fish as a trailing dropper in slow current lanes right before the afternoon hatch kicks off.
Best Time and Section This Week
Guide's Take
We are experiencing a highly unique spring transition on the Snake right now. The warm snow drought has compressed the season — the typical late-spring dry-fly window is condensed, which means the clear-water tailwater of Reach 1 is providing some of the most technical and rewarding fishing of the year. The sheer density of the midday BWO hatches on overcast days has been spectacular, with fine-spotted cutthroat rising eagerly in the slow, glassy eddies. While downstream reaches are rapidly succumbing to early snowmelt, focusing efforts on the pristine flows below Jackson Lake Dam offers an exceptional opportunity to experience world-class dry-fly fishing before full runoff engulfs the entire valley.
Next Week's Outlook
Flows across all reaches are projected to peak and begin stabilizing or entering early recession next week. With the basin snowpack at just 41% of median and melting rapidly, the runoff peak is exceptionally early and short-lived. Hatch activity will see a transition — early caddis and initial Salmonfly activity will intensify as water temperatures climb, alongside consistent midday BWO hatches on the upper tailwater. Due to the compressed season, there is high booking urgency for anglers to secure remaining dates and target the historic early-clearing post-runoff window in June.
Conservation Note
Water temperatures remain exceptionally cold, ranging from 41°F to 48°F, which keeps native trout active and free from heat-induced metabolic stress. However, native fine-spotted Snake River cutthroat trout are currently in their spring spawning window. Anglers must fish ethically by avoiding shallow, clean gravel beds in side channels where spawning redds are present, using barbless hooks, wetting hands before handling, and keeping trout fully submerged during release to ensure safe passage through the spawn.
Common Questions This Week
Is the Snake River completely blown out, or can we still float and fish?
While the lower sections below Moose (Reaches 2 and 3) are taking on heavy snowmelt and running muddy with 1–3 feet of visibility, the upper tailwater from Jackson Lake Dam to Moran remains clear and highly fishable. The dam release is holding at a controlled flow, keeping Reach 1 ice-clear with over 6 feet of visibility. Anglers should focus entirely on this upper section for float trips, where fish are actively eating dry flies.
What is the most effective fly setup for targeting cutthroats during the midday BWO hatches?
The most productive setup is a dry-dropper or double dry fly rig. Use a highly visible attractor dry like a #10 Tan Chubby Chernobyl or a size 18 Parachute Adams, and trail it with a #22 Barr's Flashback BWO Emerger or a #22 BWO WD-40 suspended 18 to 24 inches below. Cast this rig along slow-moving seams, foam lines, and slow backwater eddies where fish are actively rising.
How will the low snowpack of 2026 affect my trip planned for late June?
The 2026 water year is experiencing a historic warm snow drought, with the basin snowpack at just 41% of median and melting out up to 40 days early. This means that the classic spring runoff peak is occurring weeks ahead of schedule and will be exceptionally short-lived. For a late June trip, this is excellent news — the river is highly likely to be completely clear, stable, and in prime summer dry-fly form weeks earlier than the typical early July opener.
The warm snow drought has compressed this season into a once-in-a-decade early clearing. Salmonfly nymphs are migrating, BWOs are carpeting the tailwater, and June is shaping up to arrive weeks early. Book now before the post-runoff window fills up.
