In late July 1805, the Lewis and Clark Expedition reached Three Forks in present-day Montana, where the Jefferson, Madison, and Gallatin rivers converge to form the Missouri River.
Join us in celebrating this wonderful day with a 5K or 10K trail run in the beautiful Missouri Headwaters State Park, near the confluence of the Madison, Gallatin, and Jefferson rivers.
This event is a part of the Montana Trail Series.
Jul 24, 2027
Distance — 10K
Type — Running
10:00
$50.00
Jul 24, 2027
Distance — 5K
Type — Running
10:00
$40.00
Learn more about the host city, Three Forks.
Three Forks is a city in Gallatin County, Montana, United States and is located within the watershed valley system of both the Missouri and Mississippi rivers drainage basins — and is historically considered the birthplace or start of the Missouri River. The population was 1,989 at the 2020 census. The city of Three Forks is named so because it lies geographically near the point, in nearby Missouri Headwaters State Park, where the Jefferson, Madison, and Gallatin rivers converge to form the Missouri River — the longest single river in North America, as well as the major portion of the Missouri–Mississippi River System from the headwaters near Three Forks to its discharge into the Gulf of Mexico. Three Forks is part of the Bozeman, MT Micropolitan Statistical Area of approximately 100,000 people and located thirty miles west of Bozeman.
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