In March, the Flathead Valley's unpredictable weather has led to unusual fishing conditions. Despite challenges, trout fishing is thriving, with guides recommending slow, deep techniques and bright flies for success.

Montana’s Stillwater River is still running cold despite a warmer-than-average winter, keeping fishing from fully turning on yet. Low flows have trout holding in deeper slots, where patient nymphing has produced action. Here’s what Montana Angler reported on March 6, 2026—and what to expect as spring temperatures rise.