2023 Old Man Winter Bike Rally & Run

199 2nd Ave, Lyons, CO 80540, USA


The 9th annual Old Man Winter Bike Rally & Run is an iconic celebration of Colorado's best mixed-terrain running and riding where you can take on the snowy foothills of Boulder County.

Event Categories:

Riders - With two bike course options: The 50km route tours some of the scenic, rolling terrain that has made Boulder County, CO one of the country’s most popular gravel riding destinations. The 100km ride starts with the same country riding as the 50km course before sending cyclists on a roller coaster route of climbs and descents through the snow-filled canyons west of Boulder.

Runners - We offer a one-of-a-kind 10km running race with trails, snow, a excellent scenery.  NEW for 2023, we will offer a 5K run course!

Multi-Sport - We offer a Run/Bike combo that is popular for multi-sport athletes which involves running the 10K run and riding the 50K bike course.

All participants are supported with well-stocked aid stations, a hot meal, cold beer, and great winter swag!