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Missouri Headwaters State Park

State Park in Rocky Mountains near Three Forks, MT

National Register of Historic Places

Montana Fishing Regulations

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Missouri Headwaters State Park is a Montana state park that marks the official start of the Missouri River. It includes the Three Forks of the Missouri National Historic Landmark, designated in 1960 because the site is one where the Lewis and Clark Expedition camped in 1805. The park is open for day use and camping, offering hiking trails, hunting, and water-related activities. It is located on Trident Road northeast of Three Forks, Montana at an elevation of 4,045 feet (1,233 m).

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