(FWP) Montana Fish, Wildlife & Parks is continuing its focus on trout health and population monitoring in the upper Jefferson River basin as part of a cooperative research effort that began last year
Trout surveys in 2023 found population estimates to be at or near historical lows in sections of the Big Hole, Beaverhead and Ruby rivers, coupled with observations of sick trout.
Trout surveys in the basin this spring showed continued trout population improvements in some mainstem sections, while other areas indicate trout abundances lower than those observed in 2024.
