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Missouri Headwaters State Park [MT]

This park encompasses the confluence of the Jefferson, Madison, and Gallatin Rivers. Lewis and Clark anticipated this important headwaters all the way up the Missouri River. An easy three-mile drive off Interstate 90 at Three Forks, this undeveloped park provides outdoor interpretive signs, picnic spots, short hiking trails, a small campground, and—just as the Corps of Discovery found—plenty of mosquitoes!

The site offers occasional recreational and educational events.