1876 Centennial Run 18.76K

Snowmass Tree-O 1876 Centennial Edition

Snowmass Tree-O 1876 Centennial Edition is a two day running event on August 7 and 8, 2026 at the New Belgium Ranger Station in Snowmass Village, Colorado. The event is organized by the Colorado Brewery Running Series and honors the State of Colorado’s 150th birthday. It features a set of distances and an overall challenge that combine to 18.76 kilometers.

The event offers these distances:

• 3.76k
• 5k
• 10k
• 18.76k Challenge completed by finishing the three distances

The 3.76k and 5k are available on either the Friday evening wave or the Saturday morning wave. The 10k is held once on Saturday morning. Participants may run, walk, jog, or hike the marked courses.

Included items and on-site features are listed by the organizer: one free New Belgium craft brew at the finish line, an 1876 Centennial Run bib and finisher medal, and the opportunity to earn the 1876 Centennial Run 18.76k Challenge medal by completing all three distances. The event also lists door prizes, live music, food from the host brewery, local vendors, an optional event t-shirt, and other giveaways. A portion of event proceeds supports local nonprofit organizations. Refunds are available up to seven days before the event. Visit the organization's website for the most recent information.

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