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  • Vail HillClimb

    Vail Trail Running Series
    Vail's Mountain Haus 292 E Meadow Dr, Vail, CO, United States

    Named Best Trail Race by Colorado Runner Magazine in 2006 & 2011! Join us for the annual Vail HillClimb! The Vail HillClimb tests local, regional and national runners with a […]

  • Hahns Peak Hill Climb

    Steamboat Springs Running Series
    Hahns Peak 64625 County Rd 129, Clark, CO, United States

    This trail race is a new event that started in 2017 at the base of Hahns Peak in North Routt County. Running this course started with a few hardcore North […]

  • Boulder Stroke & Stride V

    Boulder Stroke & Stride
    Boulder Reservoir 5565 N 51st St, Boulder, CO, United States

    The Boulder Stroke & Stride offers Boulder area athletes a fun 1-lap 750 Meter Swim, or 2-Lap 1500 Meter swim in Boulder Reservoir, followed by a 5k run on the […]

  • Silverheels Trail Runs

    Como Roadhouse 441 Boreas Pass Rd, Como, CO, United States

    **BIG CHANGES TO SILVERHEELS** HPRS continues to work in earnest on a newly revamped Silverheels Trail Runs experience. Traditionally the Silverheels 100-Mile was held in concert with The Last Call […]

  • Hardrock 100 Endurance Run

    Memorial Park - Silverton 1800 Greene St, Silverton, CO, United States

    About The Run The Hardrock Hundred Mile Endurance Run is an ultramarathon of 100.5 miles in length, plus 33,050 feet of climb and 33,050 feet of descent for a total […]

  • Frisco Triathlon

    Featured
    Frisco Bay Marina 267 Marina Road, Frisco, CO, United States

    Are you looking for a new challenge this summer? Register for the annual Frisco Triathlon featuring stand-up-paddle boarding, mountain biking, and trail running. This twist on a triathlon is open […]

  • Silver Rush 50 Mile

    Leadville Race Series
    Leadville 124 E. Sixth Street, Leadville, CO, United States

    Take on 50 miles of extreme territory that starts at 10,200 feet and reaches 12,000 feet on four separate occasions at the Silver Rush 50 Run. It will leave your […]

  • All-Out Dog Days

    Church Ranch Office Park 10170 Church Ranch Wy, Westminster, CO, United States

    Get ready for some fun in the sun and a great mid-season test of your training as we bring our 11th Annual Dog Days 5K, 10K & Half Marathon! Centrally […]

  • Heatwave Half Marathon

    Westminster Promenade 10600 Westminster Blvd, Westminster, CO, United States

    5K/10K/Half- Marathon & Relay registration includes a custom bib, designer shirt, and a custom finisher medal! 1 Mile registration is untimed and includes a custom bib, designer shirt, and a […]

  • Cookie Chase 5K

    Featured Colorado Runner Events Six Pack
    Sloan's Lake Park 1700 Utica Street, Denver, CO, United States

    The Cookie Chase is Denver’s race that ends with cookies. Runners and walkers can take advantage of a flat and fast course, and then enjoy fresh cookies at the finish. […]

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