Missouri Headwaters State Park

Missouri Headwaters State Park
Confluence of the Madison River and Jefferson River at the starting point of the Missouri River
Location in Montana
LocationGallatin County, Montana, United States
Nearest cityThree Forks, Montana
Coordinates45°55′15″N 111°29′53″W / 45.9207°N 111.498°W / 45.9207; -111.498
Area532 acres (215 ha)
Elevation4,049 feet (1,234 m)
DesignationMontana state park
Established1947
Visitors33,436 (in 2023)
AdministratorMontana Fish, Wildlife & Parks
WebsiteMissouri Headwaters State Park
Three Forks of the Missouri
LocationGallatin County, Montana
Area1,500 acres (610 ha)
Built1805
NRHP reference No.66000433
Significant dates
Added to NRHPOctober 15, 1966
Designated NHLOctober 9, 1960

Missouri Headwaters State Park is a public recreation area occupying 535 acres (217 ha) at the site of the official start of the Missouri River. The park offers camping, 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). The park 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.