North Fork Trail Race

BPIA Community Hall 18050 S. Buffalo Creek Road, Buffalo Creek, CO, United States

The North Fork 50 Mile/50K is 100% trails, mainly single track and some double track, starting and finishing along lovely Buffalo Creek, in the mountains about 50 miles southwest of Denver. This is a pure ultra, a very special and unique race, deliberately kept small so each runner gets personal attention. There are no non-ultra […]

Colorado 13er Half Marathon

Home Depot 1200 Dillon Road Louisville CO 80027, Louisville, CO, United States

The Colorado 13er is THE event where the best parts of trail running and road racing combine to create a truly enjoyable, kind-to-your-body, well-supported 13.1 race! Seasoned runners and first-timers alike appreciate the excellent communication from the 13er race crew who make this event accessible for athletes of all levels.

Steamboat Marathon

Steamboat Springs Lincoln ave, Steamboat Springs, CO, United States

Run alongside the roaring Elk River through the emerald green pastures on Country Road 129 with the snow-capped Rocky Mountains of Colorado all around and find out why the Steamboat Marathon was ranked as one of the “Top 10 Destination Marathons in North America.” Marathon, Half-Marathon, and 10K

$40 – $100

All-Out Summer Breeze

Stenger Soccer Complex 11200 W 58th Ave, Arvada, CO, United States

From the heart of the West Metro area and the Stenger Soccer Complex, All-Out brings you our 11th annual Summer Breeze! Along with its Endless Series sidekick in January Polar Prowl, these 5K, 10K and half marathon courses will follow Van Bibber Creek Trail west through Arvada's open spaces with spectacular views of the countryside […]

Ironman 70.3

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

Boulder has been a household name in the world of triathlon for decades. This endurance community has built a reputation among triathletes for training hard, racing fast and enjoying every mile of scenic beauty along the way. But what makes this town really special, are all the adventures that await you after race day. Sunrise […]

Father’s Day Classic

Apex Center 13150 W 72nd Ave, Arvada, CO, United States

It's an annual Fathers Day tradition in Arvada! All are welcome - walkers, joggers and speed demons, too! Swag includes t-shirts for ALL participants! There is a 5K and 10K. The Fun Run is an un-timed 1 mile out and back run/walk and the MANLY MILE is open to men and is a TIMED race!

Unicorn 5K

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

Ready to get off the sofa and gallop around Thornton with some friends?  Yeah, you are!  Come frolic with us at the Unicorn Runner 5k in Thornton to kick off your summer!  You'll earn a sweet tee shirt and a flashy unicorn finisher medal! It's a 5k distance for all, and whether you walk, trot, […]

Estes Park Backyard Ultra

Estes Park High School 1600 Manford Ave, Estes Park, CO, United States

The Backyard Ultra with the views. ​ The Backyard Ultra is a form of Ultra race where runners must complete 4.167 miles in less than one hour, every hour, until only one runner remains to complete a lap. This runner is crowned the winner and only finisher, while all others will be marked as DNF. There is […]

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.

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