The Gallatin River is a premier fly fishing destination that originates at Gallatin Lake high in the mountains of Yellowstone National Park at an elevation of 8,834 feet. This blue ribbon trout stream flows north for approximately 120 miles through Montana before joining the Madison and Jefferson rivers to form the Missouri River near Three Forks. The Gallatin transforms dramatically throughout its journey - from a small mountain stream in Yellowstone to a fast-flowing river carving through the scenic Gallatin Canyon, and finally widening as it meanders through the fertile Gallatin Valley. Characterized by crystal clear water, diverse aquatic habitats, and stunning mountain scenery, the Gallatin offers exceptional fishing opportunities for anglers of all skill levels throughout the year.