Spooky Sprint Half Marathon

Chatfield State Park 11500 N Roxborough Park Road, Littleton, 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.

Cart to Cart Trail Run

Camp 4 Coffee 4th st and Elk Ave, Crested Butte, CO, United States

10 or 19 mile trail runs at the height of fall colors in Crested Butte.  Fun prizes to winners and random participants. https://www.cbmountainrunners.org

$75

Rim to Rim Royal Gorge Run

Royal Gorge Bridge and Park 4218 Co Rd 3A, Cañon City, CO, United States

Join us for an extraordinary day of running on October 5th, 2024. We will host our annual 5K, an 8-mile trail run, and a half-marathon trail run. After great remarks […]

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, […]

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