John Colter Run
Three Forks, Montana, United States
Sep 19, 2026 - Saturday
5k, Half-marathon, Marathon
Race Information
The course is approximately 7 miles long, with the first mile and a half on a paved/gravel country road, and the remaining 5.5 miles on mostly rugged trails, just like it was when Lewis and Clark came through here. The trail portion is relatively rough but suited for cross-country running. There are two railroad crossings. The last ¼ mile of the course encompasses two water crossings. The first water crossing goes under the railroad bridge (as stated above). Tie your shoes tight because the mud can be knee deep! The second water crossing is the Gallatin River. Be prepared for water up to waist deep at each crossing. A safety rope will be secured across the river. Bring an extra change of clothes for the awards ceremony and refreshments.
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👍 Run Pick of the Month: Montana Marathon
📍 Billings, MT - September 20, 2026
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😄 Why We Like This Run
✅ Big Sky views from a small-town start to an energetic downtown Billings finish
✅ Fast downhill course built for PRs
✅ Multiple race options including marathon, half marathon, 10K, and 5K
Chase a personal best at the Montana Marathon, a fast, scenic point-to-point course that drops over 1,000 feet from the rolling plains into downtown Billings. With wide-open Big Sky views and a Boston Qualifier–certified route, it’s the perfect blend of speed and unforgettable scenery.
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Race Facts
Race Size: 100 - 500
Course Type: Trail
Boston Qualifier: No
Kids Run: Yes
Where to Stay
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