Trail Running calendar near Harlowton 2025-2026

The AIDSPIRIT USA Marathon, held in Harlowton, Montana, is a scenic race starting in the Little Belt Mountains within Lewis & Clark National Forest and finishing in historic Harlowton. The event features a full marathon, half marathon, 10K run, and 5K fun run, all on compacted, calcium chloride-trea..

Rim Runner Trail Trek is the final race in Yellowstone Rim Runners’ Free 3 Summer Race Series, held at Dover Park in Billings, Montana. The event features a 5K-ish trail course on Dover Park trails with scenic views. It’s described as a low-key club race that replaces the group runs, with snacks pro..

Montana Meltdown is a fixed-time ultramarathon held at Gallatin Valley Regional Park in Bozeman, Montana. Runners tackle a 1.5-mile loop for 24-, 12-, or 4-hour races, testing endurance and speed in a supportive, competitive atmosphere. The course features a single aid station roughly every 1.5 mile..

The Bobcat Trail Challenge at Crosscut is a trail running event held at the Crosscut Mountain Sports Center in Bozeman, Montana. The race features a challenging 5km cross-country ski loop course, with options to compete in 5k, 10k, or 20k distances. Participants can also join as part of a 2 or 4-per..

The Montana Cup is a team-based cross-country running event held at Gallatin County Regional Park in Bozeman, Montana. It unites runners from across Montana’s regions to compete for a traveling trophy. The race features separate categories for men and women, divided by age groups (under and over 40)..

Crazy Mountain 100 is a 100-mile mountain ultramarathon in Montana's Crazy Mountain Range. The race begins at Westling Ranch in Wilsall and finishes near Lennep on Berg Road, with stages hosted on two family ranches and passing through Indigenous lands. Runners tackle about 23,000 feet of vertical g..