Clark Fork River Fishing Report, May 23, 2026
Western Montana is on the back side of a big runoff push. All four rivers crested last week and are dropping fast — clarity is improving daily, but flows are still high and off-color. This is a subsurface week: heavy nymph rigs and streamers worked tight to soft edges, side channels, and inside seams are the consistent producers, with a developing caddis and BWO dry game in the evenings. The story everyone is watching is the Salmonfly hatch — the first nymphs are showing on Rock Creek and the Blackfoot, and a warm weekend could trigger the first adults. Best fishing window this week is roughly 11:00 a.m.–3:00 p.m.
Warning: Hazards this week
- Bitterroot: Log jams and debris throughout the system, with debris specifically reported at the Main Street Diversion and an obstruction near Poker Joe. Float cautiously.
- Rock Creek: Tree down at Mile Marker 27, plus a new sweeper between Upper Fire Ring and the Microburst. High flows make wading dangerous — spot-check anything questionable before committing to a float.
- All rivers: High, pushy water. Wade conservatively; a wading staff and studded boots are well worth it this week.
At a glance: Still big and dropping (~5,200 cfs above town; lower river very high), off-color and clearing · 48–53°F · Grizzly Hackle: 1/5 · Best window: 11 a.m.–3 p.m.
The Clark Fork is still pumping a lot of water but is on the drop, and the mud is starting to move out — that glacial green is beginning to peek through. The upper river (Galen, Jens, Bearmouth, Beavertail) is mud-free, fishing best, and worth getting to before the green weed sets in. Below town needs another week or so to clear and turn on. The cold snap has helped keep upper-river temps down.
Best techniques:
- Subsurface is the play. Heavy indicator rigs with a stonefly nymph — Pat's Rubber Legs, Double Bead Stone, Front St. Stone, Zirdle, TJ Hooker, D-Rib Stone, or a 20-Incher — plus worms (San Juans, Wire Worms, Squirms). Trail a Pheasant Tail Nymph, Frenchie, Duracell, Blow Torch, Prince Nymph, or double-bead Hare's Ear.
- Streamers shine in the off-color water — lean on darker Dungeons, Gongas, and Woolly Buggers in black, purple, and olive; mix in white or gold Sparkle Minnows or a Masked Avenger where you find cleaner side channels.
- Dry-dropper a Chubby Chernobyl (or the Hi-Vis Micro Chubby) to cover opportunistic risers.
Hatches
The last March Browns, BWOs, the Mother's Day caddis, and the beginning of the fluttering stonefly hatch are all showing. Fish look up in soft water during warm afternoons or under cloud cover. Top dries: Purple Haze, BWO Comparadun, Last Chance Cripple, Parachute Adams, X-Caddis, Corn-Fed Caddis, Brindle Chute, Elk Hair Caddis, and Plan B. Watch for Grey Drakes, salmonflies, and golden stones as it warms.
The Fly Box
Nymphs: Pat's Rubber Legs, Double Bead Stone, Zirdle, TJ Hooker, 20-Incher, Wire Worms, Pheasant Tail Nymph, Frenchie, Duracell, Blow Torch, Prince Nymph, Hare's Ear
Dries: Chubby Chernobyl, Chubby, Purple Haze, Comparadun, Last Chance Cripple, Parachute Adams, X-Caddis, Corn-Fed Caddis, Brindle Chute, Elk Hair Caddis, Plan B
Streamers: Woolly Buggers, Sparkle Minnows
Outlook: Sunny and warm into early next week — highs in the 70s, possibly 80 on Monday — then rain and cooler temps return Tuesday for a few days. Expect the upper river to keep improving while the lower river lags.
