Half Marathon

Join us at the YMCA of the Rockies in Granby for the annual Snow Mountain Ranch Trail Running Festival. This event features 4 races with 2 different “challenges”.  Races will […]

Mountain Ridge takes place near Highlands Ranch primarily on the Douglas County East-West Regional Trail. This gently rolling course will keep the Heart Rate pumping while offering some of the […]

The Barr Lake Trail Race returns to Brighton, CO, offering beautiful lake views and a prime opportunity for new PRs. Now in its sixth year, this event features our flattest […]

After a special night edition last year, Westminster returns to its traditional daytime format in 2026 — bringing runners back to a classic morning on the trails at Standley Lake. […]

Welcome to the Summer Splash Prairie Dog Half, 10k & 5k in Castle Rock, Colorado. Part of the Prairie Dog Half race series, join us in July as we race […]

Racing Underground brings you an amazing half marathon this spring! The Three Creeks Half Marathon features a half marathon course that is flat, fast and scenic! Travel on foot through […]

The Ralston Creek races feature a fun winter half-marathon and 5K run conveniently located on the west side of the Denver Metro Area in Arvada, Colorado. The courses covers a […]

Held on the Autumnal Equinox during the height of fall color, the Equinox Marathon, Half Marathon and 5-miles races are all point-to-point, net downhill, scenic courses along the Cache La Poudre River in Fort Collins. This year, the event will take place on September 18th.

The RunDenver Series is the original running series in Colorado and has been a staple for over three decades. Produced by HAL Sports, the series promises a fun time through […]

Both races start & finish at Sparge Brewing in Wellington 3999 GW Bush Unit 101, Wellington, CO 80549