Upper Madison Fishing Report
Upper Madison River Fishing Report
Updated 03/25/2026
Current Flow: ~ 762 CFS @ Kirby Ranch near Cameron
The Upper Madison River has been fishing well and is starting to feel like early spring is settling in for good. Warmer temperatures have moved in across Southwest Montana, with daytime highs pushing into the 60s and even low 70s this week. Flows remain stable out of Hebgen, and clarity has been good overall. Fish are in great shape right now, and we’re continuing to see that strong class of rainbows from last year showing noticeable growth—setting things up nicely for the season ahead.
Wind has been the biggest factor lately, which is pretty typical for March. Some days are manageable, others not so much, so it’s worth keeping an eye on forecasts and focusing on more protected sections when needed. That said, when conditions line up, fishing has been very consistent.
Nymphing continues to be the most reliable approach. Stonefly nymphs like rubberlegs and girdle bugs paired with smaller mayfly nymphs or flashy attractors have been producing steady action. Fish are still holding in slower, deeper water during the colder morning hours, so getting flies down with enough weight is key. As the day warms, we’re seeing fish slide into buckets, seams, and the softer edges below riffles to feed more actively.
Streamer fishing has been picking up with the warmer water temps. Fish are starting to show more willingness to move, especially on overcast days. Smaller sculpin and baitfish patterns have been effective when fished methodically through deeper runs, banks, and transition water. It’s not lights-out yet, but it’s definitely improving day by day.
Dry fly fishing is still a bit weather dependent, but it’s trending in the right direction. Midges are consistent, and we’re seeing more Blue Wing Olives starting to show on cloudy afternoons. These windows have been short but productive when the wind lays down. Expect dry fly opportunities to become more consistent as we move further into late March and early April.
Recommended Flies
Nymphs: Perdigon #16–18, Wire Worm, Zebra Midge #16–18, Perdibomb #18, Slush Egg, Pat’s Rubberlegs #10–14, Scuds and Sow Bugs #14-18, 20 Incher #12, Radiation Baetis #18, Three Dollar Dip #16-18
Streamers: Sculpzilla (olive or black), Mini Dungeon, Mini Dolly Llama
Dries: BWO Cripple #18, Parachute Adams #18, Brooks Sprout Midge #18, Griffiths Gnat #18
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