
John Colter Run
Three Forks, MT
Sat, Sep 19, 2026
In 12 days · Sat, Sep 19, 2026
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Saturday, September 19th, 2026
Missouri Headwaters State Park, Three Forks MT
45–71°F · low rain risk
See last 10 years
On this date: rain 2 of the last 10 years
2025
48–77°F
dry
2024
42–71°F
dry
2023
48–74°F
dry
2022
44–79°F
dry
2021
48–60°F
dry
2020
51–69°F
rain
2019
50–62°F
dry
2018
48–59°F
dry
2017
41–54°F
rain
2016
47–77°F
dry
Best months to race in Montana →
Race-day forecast · Saturday, Sep 19
Cloudy · 54–74°F
Saturday, Sep 19starts near 54°F · 22% chance of rain · wind up to 20 mph
About this race
Race Details
- Date: September 19, 2026
- Start Time: 9:00 am sharp
- Location: Missouri Headwaters State Park – one mile south of Trident and about 6 miles northeast of Three Forks, MT
- Parking: Limited: please carpool
The Course
- Length: Approximately 7 miles
- Surface: First 1.5 miles on paved/gravel country road, remaining 5.5 miles on rugged trails
- Crossings: Two railroad crossings: BNSF will stop trains at the first crossing where a guard will be present
- Trail Marking: Marked with rock cairns, flags, stakes, skulls, bones, and beer bottles
Water Crossings
- Crossing Locations: Last ¼ mile includes two water crossings
- First Crossing: Goes under the railroad bridge with mud that can be knee deep
- Second Crossing: The Gallatin River, expect water up to waist deep
- Safety: A safety rope will be secured across the river: bring an extra change of clothes for post-race
Awards and Prizes
- Special Prize: First 50 runners beating "John Colter" to the Beaver Dam (approximately 6.5 miles in)
- Finish Awards: Overall top male and female, age group winners, youngest and oldest runner
- Recognition: Special awards for deserving participants
- Post-Race Party: Barbeque with beer and live music for all participants
Important Information
- Registration: We are limited to 300 participants: registration opens on April 1, 2026
- Refund Policy: Entry fees are non-refundable if unable to run the race
- No Bib Transfer: Race bibs cannot be transferred to others
- Shirts: Race shirts are only awarded to finishers
Cancellation Policy
- Conditions: Refunds and swag provided only if race canceled due to excessive smoke, fire, or pandemic
- Race Continuation: We will do everything possible to not cancel the race
- Participant Considerations: Enjoy being outdoors and embrace fresh air
- Walkers & Dogs: Walkers are not permitted: no dogs allowed on the race course
Thank You to Our Sponsors
Thanks to our sponsors: Headwaters State Park, BNSF, GCC, Main Street Over Easy, Bozeman Speedy Lube, Bozeman Running Co. Bobcat ROTC, Gallatin County Search and Rescue, Lerhkinds, Yellowstone Bank, Dark Horse Construction, and Muddy Dog Sports (Timing)
Learn More
For more information, visit our race page.
Course map
Hotels for race weekend
Live prices near the start line, Sep 18 – 20, 2026.
Train with a club
Run clubs near Three Forks to train with before race day.
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