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

  • Estes Park Marathon

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

    The Estes Park Marathon is America’s most scenic marathon course! In the marathon, runners enjoy our famous road course that is surrounded by glorious 360 degree views of Rocky Mountain […]

  • 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! The Fun Run is an un-timed […]

  • Highline Canal Summer Scamper

    Bible Park 6802 E Yale Ave, Denver, CO, United States

    The third annual High Line Canal Summer Scamper, 5K for All, will take place on the evening of June 25 at Bible Park in Denver. Before the 5K enjoy a […]

    $30 – $45

  • The John Cappis

    Silverton 414 Greene Street, Silverton, CO, United States

    What A free mountaineering jaunt originated by James Varner in honor of the legendary John Cappis, one of the founders of the Hardrock 100. The course gets tweaked from year […]

  • Timberview Trail Run

    Lory State Park 708 Lodgepole Dr, Bellvue, CO, United States

    Crisp morning air and a summer sunrise in Colorado. YES PLEASE! Join us on the foothills at Lory State Park for a fun & beautiful morning trail race. This run […]

    $20 – $50

  • Loveland Lake to Lake Triathlon

    Loveland High School 920 West 29th St., Loveland, CO, United States

    Loveland Lake to Lake Triathlon has welcomed athletes from Northern Colorado, this entire state, region, country,  and outside the USA for 24 years and we are excited about our 2025 […]

  • Slacker Half Marathon

    Strousse Park - Georgetown 6th & Rose St, Georgetown, CO, United States

    The Slacker races are always held on the 4th Saturday in June! We’re excited to announce a new change for next year:  wave starts will be enhanced to help ensure […]

  • Leadville Race Series

    Leadville Trail Marathon

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

    Run through the historic mining district’s challenging old mining roads and trails, and hit a high of 13,185 feet at Mosquito Pass during the Leadville Trail Marathon or Heavy Half […]

  • Blue Sky Ascent

    Echo Lake Campground 13264 Chicago Creek Rd, Idaho Springs, CO, United States

    Although the air will be noticeably thin at the starting line, Echo Lake's 10,600 feet of elevation is just the beginning. The climb totals nearly 4,000 vertical feet - much […]

  • Boulder Sunrise Triathlon

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

    Join us in celebrating the start of summer in the triathlon capital of the country, Boulder, CO. An athlete favorite with its breath-taking sunrise swim, fast bike and smooth run […]

    • 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: 186