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Gallatin County, Three Forks
At this historic confluence, the Jefferson, Madison, and Gallatin rivers merge to form the Missouri River. The park preserves not only the site where the Lewis and Clark Expedition camped in 1805, but also a rich riparian corridor that cuts through the dry, surrounding hills.
The convergence of three major rivers creates a dynamic environment of gravel bars, cottonwood stands, and slow-moving backwaters. The mature trees support nesting Great Horned Owls and Bald Eagles, while the dense willow thickets harbor Gray Catbirds, Yellow-breasted Chats, and Lazuli Buntings. The river channels themselves are hunting grounds for Osprey and Belted Kingfishers. In the winter, the moving water remains partially open, attracting Common Goldeneyes and Common Mergansers.
Visitor Access
Managed by Montana FWP, the park is open year-round. Entry is free for Montana residents who have paid the state parks fee; non-residents pay an $8 vehicle fee. The park features a network of paved and gravel walking trails, interpretive signs, and a campground. The trails along the riverbanks provide excellent, easy access for birding.