Current conditions report — Flathead River — March 2026
Flathead River is one of Montana's premier trout fisheries, located in the Northwest Montana region. The river is well known for producing quality Cutthroat Trout and Bull Trout, drawing anglers from across the country throughout the season.
Fishing on Flathead River varies significantly by season. Spring runoff typically peaks between April and June, with conditions improving as flows stabilize. Summer offers excellent dry fly opportunities during morning and evening hours. Fall is prime time for larger fish as brown trout move into spawning mode. Winter fishing can be exceptional during midday midge hatches.
Flathead River supports healthy populations of Cutthroat Trout, Bull Trout, Rainbow Trout. The river's diverse habitat — from fast riffles to deep pools — provides year-round holding water for trout of all sizes.
Always check the current Montana fishing regulations before heading out. Regulations on Flathead River may include special catch-and-release sections, artificial-only stretches, and seasonal closures. A valid Montana fishing license is required.
Trout Bible pulls live flow and gauge data directly from the USGS National Water Information System. Current CFS (cubic feet per second) and gauge height readings are updated every 15–60 minutes, giving you the most accurate picture of conditions before you make the drive.