Other Distance

Join us for the Snowmass Tree-O (2k + 5k + 10k + 17k Challenge) on August 8 & 9, 2025. In partnership with the town of Snowmass and the New Belgium Ranger Station, this unique event will feature a 2k, 5k, and 10k run. The 2k and 5k can…

July 4th is celebrated in a number of different ways, with parades, barbecues, sparklers and fireworks, BUT there has been no better way since 2008, to get your July 4th morning off to a great start, than doing Boulder’s traditional 4K on…

Distances: 50k (9 hour cutoff) and 16 mile (7 hour cutoff) and 5 mile (New!)

A Colorado end-of-summer outdoor celebration! Come celebrate the beginning of fall in the mountains with a trail running challenge! An exciting day of festival fun and adventure on the trails near Eagle, Colorado. With the start/finish line…

The Colleen De Reuck Cross Country Classic is a XC meet honoring one of the world's greatest ever distance athletes and Boulder local, Colleen De Reuck. Every year we will celebrate Colleen’s career, her devotion to the sport of running,…

LOCATION Foothills Community Park 800 Cherry Ave, Boulder, CO 80304 EVENTS 9:00AM 10 YEARS & UNDER - 1K 9:15AM 16 YEARS & UNDER - 3K (1 x 1K + 1 x 2K) 9:40AM OPEN - 5K (1 x 1K + 2 x 2K) Course - HERE Entries close 10/11…

Weaving and rambling across the various rolling hills of Staunton State Park, the Sawmill Trail Runs serve as the ultimate test for December running. Runners will enjoy a single loop for 8-Miles, a double loop for 16-Miles, or the triple…

This event is an HPRS "Trail Party," designed to promote community and provide runners of all abilities an opportunity to enjoy trail and ultra running in a fun, stress free, environment. The Bingo! Trail Runs is a one-of-a-kind event,…

So What Is the Lions Roar for Fitness 5k/2.5K Challenge? 5K Challenge — Starts promptly at 9:00 a.m. at Lake Minnequa (near CIMS), but please arrive by 8:15 a.m. There will be a shot gun start. Medals will be awarded to all age group…