Missouri Headwaters State Park Fishing Access Site provides access to the Madison River at the confluence of the Jefferson, Madison, and Gallatin Rivers.

The park offers a boat ramp, parking, picnic areas, and interpretive trails, with amenities including restrooms, water access, and day-use facilities.

Located 4 miles northeast of Three Forks off Highway 205, this is one of several accessible fishing and paddling sites in the area's world-renowned trout waters.