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  • Grin & Bear It Trail Race

    Crested Butte Nordic Center 620 2nd St, Crested Butte, CO, United States

    The Grin & Bear It is Crested Butte’s oldest trail challenge. Historically presented as a sprint to Green Lake and back, this classic event has evolved to offer a 25k […]

  • 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 […]

  • Boulder Peak Triathlon

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

    The Boulder Peak Triathlon, Duathlon & Aquabike on July 10th is one of the countries longest and most well-known triathlons.  For the veteran or first time racer, this is THE […]

  • Audi Power of Four Trail Race

    Aspen Mountain 601 East Dean Street, Aspen, CO, United States

    The Audi Power of Four Race Series is a premier endurance race series utilizing the unique and amazing terrain of each of the four Aspen Snowmass mountains. Each race is […]

  • Silverton Alpine Marathon

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

    Experience the best of the San Juan Mountains with an 8 miler, a marathon, or a 50 kilometer run along the Alpine Loop past the historic mining ghost towns of […]

  • Tri Boulder

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

    ‘The Beast’ Long Course distance will be back for its second year! As one of Colorado’s most popular summer triathlons, Tri Boulder offers many different multisport race distances, all in […]

  • Heritage Eagles 5K

    Heritage High School 1401 W Geddes Ave, Littleton, CO, United States

    Support the Heritage Eagles cross country team at the annual Heritage Eagles 5K. Last year's race, raised over $3,500 for the Heritage Eagles xc team; $ 10.00 of every registration […]

  • Gastro-Dash 10K

    Roberts Lake Park 1035 N 7th St, Berthoud, CO, United States

    The Berthoud Gastro-Dash 10K is not just a footrace; it’s an epic, hilarious test of both speed and stomach, challenging runners to tackle a 6.2-mile course punctuated by mandatory food […]

  • TransRockies Run

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

    The TransRockies Run (Pass to Pub) is a trail running stage race also known as “Summer Camp for Big Kids”! A three stage race traversing the continental divide between Hope […]

  • Barr Trail Mountain Race

    Cog Railway/Barr Trail 515 Ruxton Ave, Manitou Springs, CO, United States

    The Barr Trail Mountain Race is one of the Front Range’s historic summer mountain running events. The 12.6-mile course begins at the Cog Railway Station (6,570 ft) in Manitou Springs, Colorado, ascends […]

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