Postponed Blue Sky Ascent

Echo Lake Campground 13264 Chicago Creek Rd, Idaho Springs, CO, United States

Although the air will be noticeably thin at the starting line, Echo Lake's 10,600 feet of elevation is just the beginning. The climb totals nearly 4,000 vertical feet - much of it above treeline - as you make your way 14.5 miles to the finish line located at the summit of one of the most […]

Hometown Half Marathon

Weidner Field 6303 Barnes Road, Colorado Springs, CO, United States

Join us for the annual Hometown Half Marathon & 5k/10k! A run local-themed event that is perfect for the whole family. The fun includes great swag (designer shirt, custom medal), chip-timing, live results and awards, pacers for half marathon free photos, a "biggest team" contest, a kids' dash, great post-race food, and plenty of fun! […]

Midsummers Night Run

Winter Park Resort 85 Parsenn Rd, Winter Park, CO, United States

Join us for an evening at Winter Park by participating in our Second Annual Midsummer Night's 10k!  This run will begin and end at the base of Winter Park Resort with an elevation gain of approximately 570 ft.  Enjoy a combination of gravel roads and trails on this run.

Timberview Trail Run

Lory State Park 708 Lodgepole Dr, Bellvue, CO, United States

Crisp morning air and a summer sunrise in Colorado. YES PLEASE! Join us on the foothills at Lory State Park for a fun & beautiful morning trail race. This run race features three distances (a 10 mile, a 5 mile and a 5K) that are great for just about any level athlete at any age. Run on […]

$20 – $50

Slacker Half Marathon

Strousse Park - Georgetown 6th & Rose St, Georgetown, CO, United States

The Slacker races are always held on the 4th Saturday in June, and in 2025, that means Saturday, June 28th! We’re excited to announce a new change for next year:  wave starts will be enhanced to help ensure a smoother race start. Be sure to watch for this update when registering! We can’t wait to […]

Leadville Trail Marathon

Leadville 124 E. Sixth Street, Leadville, CO, United States

Run through the historic mining district’s challenging old mining roads and trails, and hit a high of 13,185 feet at Mosquito Pass during the Leadville Trail Marathon or Heavy Half Marathon. The views will leave you breathless, if you’re not already.

Pride 5K

Civic Center Park 101 14th Avenue, Denver, CO, United States

The Denver PRIDE 5K enables supporters of The Center on Colfax to raise funds in support of our mission. We provide critically important programs and services to Colorado’s LGBTQ community. 100% of each dollar raised by individual fundraisers goes directly to support our community members--including our youth center, health services, and social support groups. Join the race today!

Pearl Street Mile

Mountain Sun Pub and Brewery 1535 Pearl St, Boulder, CO, United States

Join Troop Events on Saturday August 6th for the 25th annual Pearl Street Mile, a criterium multi-lapped course that starts on Spruce St, and completes 3.75 laps around the Boulder Court House and up the Pearl Street Mall. This year, the race is the USATF Colorado One Mile Championships! There will be a Kids 800m, Family and Friends 1-Mile, time based 1-Mile waves, Masters 1-Mile races, and Elite Open 1-Mile races.

$35

Boulder Sunrise Triathlon

Boulder Reservoir 5565 N 51st St, Boulder, CO, United States

Join us in celebrating the start of summer in the triathlon capital of the country, Boulder, CO. An athlete favorite with its breath-taking sunrise swim, fast bike and smooth run course, all with the flatirons painted in the background. You’ll never want to race another venue again after this experience! The seasoned race crew led […]

Boulder Sunrise 5K/10K

Boulder Reservoir 5565 N 51st St, Boulder, CO, United States

The Boulder Sunrise 10k & 5k Run has a reputation of being one of the most scenic courses around. BBSC will provide runners with a supported course, including plenty of aid stations fully stocked and staffed with volunteers. Once you reach the finish line enjoy the post-race party with music, beer, food, and awards! This […]

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