Our 23 mile, 40 mile, and 75 bike courses include some of Boulder County's best gravel and paved roads. The legendary 75 mile course adds in canyons and snowy single track.
Running courses include a 5K, 10K, or half marathon tour of Lyons, CO. The scenic 10K can be combined with the 40 mile bike course for a wintry multi-sport challenge. All participants are supported with well-stocked aid stations, a hot meal, cold beer, and great winter swag!
The running and riding community comes together for a big after party with live music, bonfires, hot food, cold beers, s'mores, and a huge expo.
Reserve your spot before Old Man Winter Rally sells out!
