Cutthroat Season Opens: Snake/Yellowstone at 52°F with Runoff at 3,170 cfs

What's Biting

What's Next

Over the next two to three days, flow is likely to hold steady or tick upward as daytime highs continue to accelerate snowmelt across the Teton and Absaroka ranges — a normal pattern for early May. Check local forecast before heading out, as afternoon weather in both drainages can shift quickly, and rising flows typically follow warm afternoons with a 12–24 hour lag.

At 52°F, water temperature sits in a productive middle ground: cool enough that fish aren't pushed deep in thermal stress, warm enough that midday feeding activity is plausible when the sun loads slower side channels. If temperatures nudge above 55°F over the coming weekend, look for sporadic dry-fly opportunities in the afternoons — particularly in sheltered back-channels and tailouts where current is gentle and hatches can concentrate.

Hatch Magazine's coverage of Yellowstone-region caddis emergences points to a hatch calendar that is right around the corner. Elk Hair Caddis and X-Caddis patterns in sizes 14–16 are worth having rigged as a backup, while MidCurrent's recent tying columns have highlighted high-contrast bead-head nymphs and spare midge-style flies for clear, pressured water — both directly applicable to the more technical Yellowstone corridor sections where trout see heavy angling pressure. For the Snake near the Tetons, larger stonefly nymph patterns remain the regional standard until flows begin their post-runoff drop.

Timing windows to plan around: the next 72 hours favor morning sessions before afternoon wind picks up across the valley floor. The waning gibbous phase produces tighter dawn and dusk feeding windows rather than sustained all-day activity. If flows hold below roughly 3,500 cfs, accessible wade sections on the Snake near the Tetons will remain fishable — watch for off-color water if a warm weekend pushes runoff hard into the weekend.

Context

Early May is historically the transition point for both the Yellowstone and Snake River drainages: the season is open, but peak runoff has not yet arrived. Most years the Snake near Jackson begins climbing in earnest through mid-May, typically peaking somewhere above 8,000 cfs in late May or early June before the summer drop back to wading levels. At 3,170 cfs today, the river sits well below that peak, which means wade access is still workable on most sections and boat anglers have manageable water.

Field & Stream's aquatic insect primer places stoneflies and caddisflies at the center of the Western trout river diet through May and June — consistent with what Yellowstone and Snake drainage regulars expect from a normal season calendar. Hatch Magazine has drawn an explicit line between early-season caddis timing and the Yellowstone drainage, suggesting the current hatch window aligns with the typical late-April to mid-May onset for this region.

With water at 52°F, conditions appear to be running roughly on schedule for the first week of May — perhaps a day or two ahead of a cold spring, but not dramatically early or late. No source in the current angler-intel feeds signals an anomalously warm or cold year in this specific drainage. The honest read is that this looks like a normal early-May setup: manageable flows, productive temperatures, and subsurface tactics carrying the day while the dry-fly season quietly builds toward its June peak.