Montana is known for its excellent fly fishing opportunities, with its clear, cold rivers and streams offering a variety of fish species to target. Some popular Montana fly fishing locations include the Yellowstone River, the Madison River, and the Gallatin River. The state is home to various fish species, including rainbow trout, brown trout, brook trout, cutthroat trout, and mountain whitefish. The best time to fly fish in Montana depends on the species and location, but spring and fall generally offer the best conditions. It is important to note that a Montana fishing license is required and to be aware of any regulations and restrictions in the area you plan to fish.