Billed as the “most difficult mountain bike race in the country,” the Butte 100 will be held just outside of Butte on Saturday.
The event, which starts and finishes near Homestake Lake, will feature 100-, 50- and 25-mile races.
Jamie Lamb of Calgary, Alberta, and Ali Wilson of Kimberley, British Columbia, are the defending professional champions in the 100-mile race.
The 100-mile race begins at 6 a.m. The 50-mile race begins at 8 a.m., and the 25-mile trek starts at 11 a.m.