Kootenai River fishing conditions shaped by Libby Dam flows

Fishing conditions in Montana's Kootenai River are currently being shaped by flow releases from the Libby Dam, operated by the U.S. Army Corps of Engineers. Current flows are ranging between 8,000 and 11,000 cfs, making drift boats or rafts more suitable than wade fishing. When flows drop below 7,500 cfs, wading becomes more viable in the stretch between the Kootenai Falls Wildlife Management Area and the bridge at Troy.

Anglers are reporting midge activity, specifically Zebra and Mercury Blood Midges, in the cold tailwater reaches. Due to the low water temperatures, which remain in the 40s even during summer, specific gear and attention to Montana Fish, Wildlife & Parks regulations are advised, particularly regarding the catch-and-release requirements for bull trout.

In other parts of the state, trout populations are being found in overlooked, shaded canyon stretches and cold-water refugia to avoid the thermal stress of August temperatures. Montana Fish, Wildlife & Parks recommends ceasing fishing when water temperatures reach 73°F to prevent increased mortality rates.