Clark Fork River Fishing Report 5/11/26
The Clark below town has bumped to 7800. The mud has remained. Long live the mud. The Clark once you get up above Rock Creek has fine clarity however, the weeds, detritus, and green goop are making themselves present on the river bed. Despite the goop, there are still fish to be caught in the upper Clark if you can withstand the occasional wad of mysteriuos plant growth lumped into your bugs. If you want to float or wade up there, i'd do it soon. Especially if these blistern hot sunny May days continue.
Hatch activity is looking up! The last of the March Browns, BWOs, Mothers Day Caddis, and the beggining of the Fluttering Stone hatch, are making themselves known. Fish will look up in softer water during warmer parts of the day in the evening, or if there is cloud cover during the day. Patterns like a Purple Haze, BWO Comparadun, Last Chance Cripple, and Parachute Adams, X-Caddis, Corn-Fed Caddis, and CHUBBIES can pick off opportunistic risers in back eddies and slower seams.
That said, nymphing and streamer fishing remain the ticket for consistent success right now. With the added turbidity, getting flies down into the strike zone is critical. Heavier indicator rigs with stonefly nymphs, San Juan Worms, and mayfly patterns like Pheasant Tails, Frenchies, and dark perdigons are producing. Focus your efforts on inside seams, slower buckets, and transition water where fish are holding out of the heavier current.
Streamer fishing continues to be very effective in these conditions. The off-color water favors larger, high-contrast patterns, so lean into darker flies like black, purple, and olive Dungeons, Gongas, and Woolly Buggers. If you find slightly cleaner side channels or improving clarity, mix in white or gold patterns like Sparkle Minnows or Masked Avengers. Fish them slow and deep along structure, undercut banks, and softer edges. While it’s not quite prime dry fly season yet on the Clark Fork, there’s still solid opportunity if you focus subsurface and adjust to the river’s color and flow.