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  • All-Out Spring Fever

    North Area Athletic Complex 19500 West 64th Pkwy, Arvada, CO, United States

    From the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents our 11th annual Spring Fever from Jefferson County's NAAC Stadium… easily accessible from several nearby highways. Along […]

  • Central Park 5K

    Stapleton Central Park 8801 Martin Luther King Jr Blvd, Denver, CO, United States

    Is it spring or still winter? We'll know when we run the Central Park 5k at the end of March! Celebrate the end of winter with us on this flat […]

  • Behind the Rocks Ultra

    Behind the Rocks Trailhead Moab, UT, United States

    Behind the Rocks Ultra starts and finishes at the Behind the Rocks Trail, along the border of the Behind the Rocks Wilderness Study Area. Moab's last hidden gem; its tall […]

  • Polar Plunge 5K

    Aurora Reservoir 5800 S Powhaton Rd, Aurora, CO, United States

    Are you ready for the COOLEST event of the season! Whether you're a daring plunger, a speedy 5K runner/walker, or a thrill-seeker ready to do BOTH, the Polar Plunge & […]

  • All Hands on Deck Pirates 5K

    North Creek Complex 5725 Mark Dabling Blvd, Colorado Springs, CO, United States

    This fun packed 5k is Presented by Give It Forward. Bring your entire family. It's All about community. Every child deserves a great start to the school year—but not every […]

  • Cryogenic Cannibal Chase

    Stanley Park 380 Community Dr, Estes Park, CO, United States

    Planning on some degenerate behavior at Frozen Dead Guy Days? Start your morning off right with an 8k ripper around Lake Estes. This race is the morning pre game for […]

  • RMRR Spring Marathon Training Series #1

    RMRR Marathon Training Series
    Platte River Trailhead Park Colorado Blvd and E 88th Ave, Thornton, CO, United States

    These Marathon training races are geared towards people training for spring marathons. They are supported runs with aid stations and are timed and scored. There are both 10 mile and […]

  • Equinox Half Marathon

    Sparge Brewing 3999 GW Bush Avenue Unit 101, Wellington, CO, United States

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

  • Three Creeks Half Marathon

    Cherry Creek State Park 4201 S Parker Rd, Aurora, CO, United States

    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 […]

  • Desert RATS Trail Running Festival

    Mack Trailhead on Kokopelli Trail 1022 Old US Hwy 6 & 50, Mack, CO, United States

    Desert Rats Trail Running Festival by UTMB has four unique distances, three days of racing and indescribable views of the desert. There is something for every runner. Enjoy views of […]

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