Butte 100 MTB Race Course

Race - Jul 19, 2025

Dogs Leashed

E-Bikes Not Allowed

Description from the race website butte100.com/
Welcome to the most difficult mountain bike race in the country: The Butte 100. The Butte 100 race weekend consists of three individual races, a 100 mile, 50 mile and the Sorini 25, taking place atop the Continental Divide just outside of Butte, Montana. The race has grown from a small group of dedicated locals on a gravel road, to world-class athletes competing on world-class trails. With outstanding partnerships with the USFS, BLM, community of Butte, our generous sponsors, and the "neon army" of volunteers, the Butte 100 races continue to provide the best mountain bike racing experience possible. Thanks for visiting.

The Butte 100 course consists of a figure-eight format on a "North Loop" and "South Loop," guaranteeing racers never see the same trail twice.

Racers will begin heading north. The North Loop runs 52.2 miles and approximately 6,156 feet of climbing over mainly dual-track jeep trails. The diversity of trail environs will still be very evident; the north loop consists of dense wooded area with buff packed dirt, progressing to decomposed granite, and eventually a high altitude desert environment slogging through heavy sand at times. The first portion of the race will test nearly every facet of pure mountain bike skill.

After crossing back through the Start/Finish area, 100-milers go south. The South Loop is a crowd favorite with epic amounts of singletrack on the Continental Divide Trail, with sweeping views of the area's mountains, and unparalleled athletic tests such as the notorious Basin Creek climb. Stats for the south loop check in at 47.5 miles with an elevation Gain of around ~8544 ft.

More detailed route information, and the location of all 10 aid stations can be found on the website: butte100.com/Race/Butte100M…