Conquer epic trails on the Continental Divide

The Butte 100 MTB Race, held July 19, 2025, in Butte, Montana, is renowned as one of the nation's most challenging mountain biking events. Riders can tackle 100-mile, 50-mile, and 25-mile (Sorini 25) courses across the stunning Continental Divide, taking on rugged wilderness single-track, technical climbs, and descents. The event, marked by excellent community support and vibrant volunteer energy, has attracted world-class athletes and mountain biking enthusiasts for its 19th consecutive year.

Features 100, 50, and 25-mile courses on mountainous single-track traversing Blacktail, Thompson Park, and the South Loop with technical sections and rocky climbs.

• Mandatory racer meeting on July 18, 2025
• Multiple aid stations and drop bags
• Live music, food, and post-race awards
• $2,250 frame raffle
• 19th annual event with community and agency partnerships
• Known as one of the most difficult MTB races in the US