CMRA Stone House Triple-Cross

Stone House Park 2800 S. Estes St., Lakewood, CO, United States

The race will begin just west of Estes St across from the Stone House Park on Bear Creek in Lakewood. It will head west mostly on dirt trails through the […]

Paws In The Park 5K

Boulder Country Fairgrounds Park 9595 Nelson Rd, Longmont, CO, United States

Celebrate a summer of fund-racing with us at Paws In The Park 5k Race and Pet Walk! Enjoy live music, breakfast, and mimosas. See you there!

Miles for Moms

Huston Lake Park 850 S Bryant St, Denver, CO, United States

Join us at the FloCrit campus and surrounding neighborhoods in southwest Denver for the Annual Miles for Moms Run/Walk/Roll! Lace up your running shoes for a fantastic 3-mile fundraiser run, […]

Canceled It’s Fall Y’all 5K

Carpenter Park 3498 E 112th Ave, Thornton, CO, United States

You're going to FALL in love with the It's Fall Y'all 5K at City Park in Westminster. Join 3W Races for this annual event on October 2nd, which includes a 5K run/walk, doggie costume contest, caramel apples at the finish and more!

$35 – $55

Rocky’s Backyard Ultra

YMCA of the Rockies - Estes Park 2515 Tunnel Rd., Estes Park, CO, United States

Rocky's Backyard Ultra is a challenging Ultra Trail race hosted in beautiful Estes Park, Colorado. We strive to host a challenging event that is welcoming and motivating to all. "One More […]

$140

Hot Chocolate 15K/10K/5K

Washington Park - Denver 701 S Franklin St, Denver, CO, United States

Start and finish at Civic Center Park amongst Denver's biggest chocolate aficionados. All participants receive a technical running quarter zip with registration. Runners can also enjoy hot chocolate, chocolate fondue, […]

Windsor Marathon

The Island at Pelican Lakes 1620 Pelican Lakes Point, Windsor, CO, United States

Welcome to the annual Windsor CO Race! This year's event will start and end at The Island at Pelican Lakes in Water Valley, with a great after party including beer, […]

Run Crazy Horse Marathon

Crazy Horse Memorial Ave of the Chiefs, Crazy Horse, SD, United States

Run from the shadows of the world's largest Mountain Carving, Crazy Horse Memorial, to the Heart of the Black Hills, South Dakota to finish in Hill City!

Spooky Sprint Half Marathon

Goose Gossege Park 3950 Mark Dabling Blvd, Colorado Springs, CO, United States

Join us for the annual Spooky Sprint 5k/10k & Half Marathon! A fun, Halloween-themed event that is perfect for the whole family.

RMRR 12K and 5K

Star K Ranch 16002 E Smith Road, Aurora, CO, United States

Everyone – slow, fast, or in-between –  can win  at RMRR Trophy Series races.  With our handicap scoring system, we predict YOUR finish time based on recent running results, giving you a great […]

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.