St. Ignatius 5K

Piinu Nuuchi Skate Park 591 Ute. Rd, Ignacio, CO, United States

In coordination of the St. Ignatius Fiestas, the Ignacio High School Cross Country Team will be hosting a 5K fundraiser to support our XC season. All proceeds will be applied to our teams travel, meals, training gear and next years 5k event.

Living Journeys Half Marathon

Crested Butte Mountain Resort 12 Snowmass Rd, Crested Butte, CO, United States

Hikers and runners are all invited to join us for the Annual Summit Hike, Half Marathon, and the NEW 10k Trail Run on Saturday, July 29th at Crested Butte Mountain Resort Base Area. We're thrilled to be back at Crested Butte Mountain Resort and we're adding a new, mellower trail run option! This is always […]

Pancakes for PDCD 5K/10K

deKoevend Park 6315 S. University Blvd., Centennial, CO, United States

Annual Pancakes for PDCD 5K/10K to raise money to fund research into Pyruvate Dehydrogenase Complex Deficiency (PDCD), a rare mitochondrial metabolic disorder.  100% of the profits are donated directly to Rainbow Babies Children's Hospital in Cleveland, OH; currently, the only hospital conducting research specifically into PDCD. This event is hosted by The Elizabeth Watt PDCD […]

Canceled Silverton Ultra Dirty

Silverton School 1160 Snowden, Silverton, CO, United States

Silverton Ultra Dirty is a tough but rewarding trek around some of the most beautiful scenery in the country. It will challenge you in all the best ways. Come join a welcoming community and show off what you're capable of.

$270

Backcountry Marathon and Heavy Half

Aspen City Hall 130 S Galena St, Aspen, CO, United States

Utilizing the beautiful trails that surround Aspen, The Aspen Backcountry offers two options, a full or heavy half-marathon, both run almost exclusively on dirt trails. The diversity of terrain, challenging ascents & descents and overall elevation gain will challenge even the most well-trained athletes. With spectacular views of the Elk Mountains above and the city […]

Event Series PPRR Nielson Challenge

PPRR Nielson Challenge

North Monument Valley Park 1794 Culebra Ave., Colorado Springs, CO, United States

Race Format The first time you run this event, you'll establish a base time for yourself. This base time is used to generate a handicap time. The handicap time is calculated using an algorithm developed by Bob Royse, and it's geared to favor a beginning runner and the slower runners. Click here for an explanation of the […]

Event Series PPRR Nielson Challenge

PPRR Nielson Challenge

North Monument Valley Park 1794 Culebra Ave., Colorado Springs, CO, United States

Race Format The first time you run this event, you'll establish a base time for yourself. This base time is used to generate a handicap time. The handicap time is calculated using an algorithm developed by Bob Royse, and it's geared to favor a beginning runner and the slower runners. Click here for an explanation of the […]

Sunroom Brewing 5K

Sunroom Brewing 3242 South Acoma Street, Englewood, CO, United States

Join us for the Sunroom Brewing 5k on August 5, 2023, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Englewood. Run, walk, jog - whatever goes! Complete the course and celebrate with us and a FREE, local craft brew at the finish line. Start windows will be available […]

Two22 Brew 5K

Two22 Brew 4550 South Reservoir Road, #Suite 1300, Aurora, CO, United States

Join us for The Two22 Brew 5k on August 6, 2023, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Aurora. Run, walk, jog - whatever goes! Complete the course and celebrate with us and a FREE, local craft brew at the finish line. Start windows will be available […]

Lory Summer Trail Series

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

Join us this August for a fun series of shorter midweek trail races. Our goal is to offer a fun, low-key series of races designed to give newer trail runners an opportunity to dip their toes into the trail racing waters, and to offer more experienced trail racers a chance to sharpen their speed on […]

Please click here to submit your event for FREE to our online calendar.
We do not allow events without physical locations (IE – virtual runs, runs with locations TBD, etc…).
Please allow 48 hours after submission for an event to appear on the calendar. If you have already listed your event and would like us to update it, please contact us.