Updated 12/22/25

Current Flow: ~ 386 CFS @ Gallatin Gateway

Merry Christmas and Happy Holidays from Rising Trout!

Winter conditions are settling in on the Gallatin, but the river continues to offer plenty of open water and fishable stretches, especially through the canyon and lower sections. Recent mild daytime temperatures have helped keep trout active, with the best fishing window falling between late morning and mid-afternoon once the water warms a bit. Cold overnight lows are slowing things early, so there’s no rush to start at first light. Wind has been more of a factor than water conditions on some days, so picking sheltered stretches can make a big difference. some recent rain and snow melt has raised river levels so watch for changing river conditions and clarity.

Nymphing remains the most consistent approach right now. Small baetis and midge patterns fished deep under an indicator are producing the bulk of the action, especially in slower seams, inside bends, and deeper winter buckets. Pairing attractor nymphs or rubberlegs with smaller droppers has been effective when adjusted for depth. Streamer fishing can still move fish during the warmest part of the day, but slower retrieves and smaller, natural patterns have outperformed aggressive stripping. Dry-fly opportunities are limited, though occasional midday midge activity has shown up on calm days.

Looking ahead, keep an eye on the forecast as cooler temps and possible moisture may impact ice buildup along the banks, particularly after cold nights. Focus on softer water, transitional seams, and areas with steady flow that stay ice-free longer. Overall, the Gallatin is fishing solid for winter, especially for anglers who stay flexible, fish midday, and commit to a subsurface game plan.

Recommended Flies:
Nymphs: Perdigon #16–18, Zebra Midge #18–20, Rainbow Warrior #18, WD-40 #18–20, Frenchie #18, Soft Hackle PT #16–18, Eggs #12, Pat’s Rubberlegs #10–14, Jigged Rubberlegs #12–14
Streamers: Mini Sculpin, Thin Mint, Sculpzilla, Small Sparkle Minnow
Dries: Griffith’s Gnat #18–20, BWO Cripple #18–20, Extended Body BWO #18