John Colter Run
Three Forks, United States • 19 Sep 2026
Event overview
The John Colter Run takes place on September 19, 2026, at Missouri Headwaters State Park in Three Forks, MT. The race begins and ends at the state park, located about one mile south of Trident and roughly six miles northeast of Three Forks. Parking is limited. Registration opens April 1, 2026. The event is limited to 300 participants. Race shirts are awarded only to finishers. Entry fees are nonrefundable; a 50% refund may be issued only if the race is canceled for an extraordinary reason.
Course and logistics
- Approximately 7 miles total
- First 1.5 miles on paved/gravel road
- Remaining 5.5 miles on mostly rugged, cross-country trails
The course includes two railroad crossings: the first crossing at about 1.5 miles will have trains stopped and a crossing guard; the second crossing requires going under the railroad bridge through mud and water. The last 1/4 mile includes two water crossings, including the Gallatin River. Water can reach knee to waist depth; a safety rope will be secured across the river. There is one water station near 4 miles and porta-potties at the start. The trail is marked with rock cairns, flags, stakes, skulls, bones, and beer bottles.
Rules, awards and services
Walkers and dogs are not permitted on the course. Race bibs may not be transferred. The event is professionally timed by Muddy Dog Sports. Awards include overall male and female, age-group winners, youngest and oldest runner, and special prizes. The first 50 runners who reach the Beaver Dam (about 6.5 miles) ahead of the event’s “John Colter” will receive a special prize. A post-race barbecue with beer and live music is planned. Visit the organization's website for the most recent information.