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Whether a race, special group ride, training opportunity, or cycling-related community event, the 303 calendar showcases it all.  To have an event posted here please follow this link:  Event Policy Submission & Guidelines

All Day


The goal of the LMBS is to provide a low key and inexpensive evening of bike racing for all levels of mountain bikers. With a relaxed atmosphere, there is still quality and competitive racing. This is a great series forRead More

USAC Talent ID MTB Camp

Colorado College Colorado Springs

Colorado Springs   Event details and registration here   *To the best of our abilities, this information is correct. Please check the event website for the most accurate information.

Crested Butte Bike Week

Crested Butte Crested Butte

Crested Butte   THANKS TO EVERYONE WHO PARTICIPATED IN BIKE WEEK 2018, THE WORLD’S OLDEST BIKE FESTIVAL! Whether you’re looking to cruise down Kebler on a townie, mash singletrack miles on your XC bike, or experience the joy of liftRead More

Leadville Trail 100 MTB Camp of Champions

San Isabel National Forest Leadville

Leadville   Dramatically increase your chances of capturing that coveted LT100 MTB belt buckle by attending the 2019 Leadville Trail 100 MTB Training Camp. Camp participants will ride, dine and socialize with a host of experienced buckle-sporting guides, including: •Read More

Bike MS: Colorado

Front Range Community College Westminster 3645 W 112th Ave, Westminster

Westminster   An extraordinary experience marked by passion, inspiration, determination and fun. Feel the electricity at the starting line and the remarkable support throughout your journey as we unite in our mission to end MS.   Event details and registrationRead More

Lutsen Lutsen

Minnesota   The Lutsen 99er movement continues, high above the shores of beautiful Lake Superior. This 99-mile course (69-, 45- and 25-mile options also offered) takes advantage of the scenery and topography of Minnesota’s North Shore. We will start at Lutsen SkiRead More