Late September is prime time across Montana. On rivers like the Yellowstone, Madison, and Missouri, streamer fishing is hot as browns get aggressive ahead of the spawn. Nymphing is steady in deeper runs, and baetis hatches are showing up on cloudy afternoons for some bonus dry-fly action.
On Fort Peck, walleye are sliding deeper, but anglers trolling crankbaits along points and breaks are finding fish. Smallmouth bass remain active, especially with warm afternoons. Canyon Ferry is giving up both walleye and perch, with best action near weed edges and deeper humps.
In the high country, alpine lakes are cooling fast. Brookies are in full spawning colors and hitting spinners, dries, and nymphs near shallow inlets. September is winding down, but fishing is firing up.
