⚠️ 2027 edition: provisional information
The date is estimated from the 2026 edition (July 12, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.
Available distances
About
The Big SKy Marathon offers a marathon (26.2 miles / 42.2 km) and a half marathon (13.1 miles / 21.1 km) in Montana on July 11, 2027, starting at altitude in the Beaverhead-Deerlodge National Forest and finishing in the town of Ennis, near the Madison River.
The course uses gravel and paved roads with a large net elevation drop. It includes flat high-elevation sections, steep downhill switchbacks and a gradual descent to the finish. The event is designed for dedicated marathoners looking for unique, challenging terrain in a scenic setting.
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