Low Snowpack Clears the Yellowstone Early: Trout and Walleye Both in Play

What's Biting

What's Next

**Yellowstone Drainage — Trout**

USGS gauge 06043500 recorded 1,200 cfs on the Yellowstone at Corwin Springs on June 16, suggesting the main runoff pulse has already passed or is winding down. That timeline, earlier than normal in a low-snowpack year, opens wade access on stretches that might otherwise stay blown out through late June. Look for fish stacked in the slower water adjacent to riffles and in seams below boulders and logjams where they can intercept drifting food without fighting heavy current.

The bigger concern, flagged directly by MT FWP Fishing News, is the seasonal trajectory: low snowpack this past winter combined with a hotter-and-drier-than-normal summer forecast means water temperatures will likely climb faster than usual. MT FWP deployed the new TroutCast tool, launched June 1, 2026, through a partnership with USGS and Montana State University, to help anglers and managers forecast drought-driven thermal stress on trout populations across the state's blue-ribbon rivers. It's worth bookmarking if you plan to fish the Yellowstone or other drainages deeper into summer.

For the coming days, plan around the coolest water windows: early morning through midday, before afternoon heat pushes fish into shaded lies or deeper runs. Dry-dropper rigs along undercut banks and nymphs drifted through riffles are the standard June approach on these rivers. The new moon this week typically correlates with more active daytime feeding, a welcome edge when water conditions are tightening.

**Missouri River — Canyon Ferry Walleye**

Canyon Ferry Reservoir is the Missouri anchor for this region, and MT FWP Fishing News has been direct with a management message this season: keep the small walleye you catch. Reducing competition among smaller fish gives the larger population room to grow toward trophy size, and the press release itself signals that walleye are being caught in fishable numbers right now.

For June, walleye on Canyon Ferry are typically transitioning off post-spawn shallows and moving toward deeper structure in the 10-to-20-foot range. Jigging with minnow-tipped presentations or working crankbaits along bottom transitions are standard approaches. The new moon's low-light periods at dawn and dusk can concentrate action. Check current MT FWP regulations for daily and possession limits before heading out.

Context

A mid-June reading of 1,200 cfs on the Yellowstone at Corwin Springs sits on the lower end of what the river typically carries at this point in the season. In a normal snowpack year, the Yellowstone near Gardiner can push considerably higher through June as mountain snowmelt peaks. The leaner flow in 2026 tracks directly with what MT FWP Fishing News has flagged all spring: snowpack came in below normal statewide, and the outlook calls for continued heat and dryness through summer.

That context matters for anglers making multi-week plans. MT FWP took the unusual step of hosting a public virtual townhall specifically to discuss tools for protecting Montana fisheries under drought pressure. The TroutCast tool, co-developed by USGS and Montana State University and launched June 1, 2026, provides a new resource for forecasting thermal stress on trout before conditions deteriorate. The level of proactive agency communication suggests this season warrants closer attention than most.

In a typical year, early June marks the tail end of runoff on Yellowstone drainage rivers, with high and often off-color water giving way to the clearer, more fishable conditions of midsummer. A low-snowpack year front-loads that transition: runoff ends sooner, flows drop earlier, and water temperatures begin climbing on a compressed timeline. The prime early-summer fishing window, when water is clear but not yet too warm, may be shorter than usual in 2026.

Canyon Ferry's walleye fishery is less directly affected by snowpack than the free-flowing streams. The reservoir's thermal mass buffers it from rapid warming, and MT FWP's ongoing push to harvest small walleye at Canyon Ferry is consistent with the agency's multi-year goal of shifting the population toward larger, trophy-class fish. That management thread has run through their walleye messaging for several years, making this season's press release a continuation of a deliberate strategy rather than a new alarm.