Event details subject to change. Please confirm all information via event website.

Events Search and Views Navigation

Event Views Navigation

Filters

Changing any of the form inputs will cause the list of events to refresh with the filtered results.

Today

  • CMRA Forty Furlongs

    Road Runner Sports Westminster 10436 Town Center Drive, Westminster, CO, United States

    This is a flat out-and-back 5 mile course on Westminster's trail system (nearly all concrete path). Start and finish will be at Sensory Park. The route starts outbound on Walnut Creek Trail heading East. Shortly before mile 1 the course makes a left onto the Big Dry Creek Trail. The Big Dry Creek trail travels under […]

  • PPRR Winter Series III

    PPRR Winter Series
    Fountain Creek Regional Park 2010 Duckwood Road, Fountain, CO, United States

    The series consists of four progressively longer (LONG AND SHORT) races. Please note: You must choose your distance when registering. The Long Race starts at 10:00AM. Short Race starts at 10:20AM. The courses are gravel/paved roads, packed double-track, and some single-track trails, which may or may not be snow-packed, icy, muddy, rocky, slushy, uphill and/or downhill. Altitude […]

  • Love ’em or Leave ’em 5K/10K

    Parker Recreation Run Series
    Salisbury Park 11920 N Motsenbocker Rd, Parker, CO, United States

    Will you embrace the holiday full of heart or run from Cupid? Either way, you're going to LOVE this fun and festive workout with family and friends...oh, and those pancakes! Part of the Parker Parks and Recreation Run Series, this event is professionally timed. Registered participants will receive a race shirt, race bib and a […]

  • Heart Throb 5K

    Memorial Park - Arvada 8001 West 59th Ave, Arvada, CO, United States

    Are you a Heart Throb? Grab your best running buddy and come on out to Johnny Roberts Memorial Park on the Saturday before Valentines Day. Celebrate the ability to get your heart pumping by cruising through this flat and fast 5k run (or walk!) Many participants choose this event to 'earn' the rich foods they […]

  • Ralston Creek Half Marathon

    Racing Underground Winter Running Series
    Move by Morelli 6542 Fig Street, Arvada, CO, United States

    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 scenic mix of road and bike path over rolling terrain, and an optional early start time for half-marathon runners who expect to take more than […]

  • COPS 60 Minute Race

    COPS Winter Running Series
    Colorado State Patrol Track 2054 Quaker Street, Golden, CO, United States

    The Colorado Outdoor Pace Series ("C.O.P.S.") is a unique set of races presented by Golden Mountain Runners and Golden Endurance. Race Dates January 7, 2026 - 5K January 21, 2026 - 45 Minute Timed Race February 4, 2026 - 10K February 18, 2026 - 60 Minute Timed Race March 4, 2026 - 15K March 18, […]

  • Turquoise Trail Ultra

    Gutierrez Canyon Open Space 12216 NM-14, Cedar Crest, NM, United States

    -Start/Finish line will be at the Gutierrez Canyon Open Space parking lot, located off Hwy 14. 12216 NM-14, Cedar Crest, NM 87008 -Over flow parking will be at Mountain Christian Church just north .25 miles. There is a sidewalk to get to the start/finish line. -This trail race will take place rain/snow/sunshine! Parking will NOT […]

  • Big Brrrrito! 5 Mile

    Chatfield State Park 11500 N Roxborough Park Road, Littleton, CO, United States

    We host one race per month from November to March.  All races are at Chatfield State Park and start at 9:00 am on Saturday mornings.  Check-in starts at 8:15 am.

  • Chilly Cheeks Winter Duathlon

    Chilly Cheeks Winter Duathlon Series
    Cherry Creek State Park 4201 S Parker Rd, Aurora, CO, United States

    The Chilly Cheeks Duathlon Series is now a stand-alone event held in late February. The 63rd Chilly Cheeks Duathlon will be held in the traditional format of Run-Bike-Run. Both runs will be 2.5 miles in length and the bike course will be an 11 mile paved road route. As always, we will provide a marked […]

  • Brewery Running Series Kickoff

    Barquentine Brewing Company 5505 West 20th Avenue, Edgewater, CO, United States

    Join us for our kickoff party, with special deals on all 2026 events, merch/beer discounts, an optional 5k route, giveaways, and more! We are kicking off the 2026 season of the Colorado Brewery Running Series with a fun day of sales and ales at our 2026 Kickoff Party with Barquentine Brewing and the Edgewater Marketplace! […]

    • 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.

    Views: 2