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

  • Marine Memorial 5K

    Apex Center 13150 W 72nd Ave, Arvada, CO, United States

    The race benefits THE United States Marine Corps Memorial dedicated "to all Marines for all time" to "Honor Marines and remember all who serve". Lives are changed when veterans visit the Memorial - learn more on the web site at Https://USMC Memorial Foundation.org. Funds help maintain what we have until funds can be raised to remodel the […]

  • Pat Mahan Memorial 5K

    Wiggins High School 320 Champman St, Wiggins, CO, United States

    Join us for the Pat Mahan Memorial 5K in Wiggins, Colorado, a family-friendly event celebrating the life and legacy of Pat Mahan.  Lace up your running shoes and hit the course with us as we raise funds to support local students through the Pat Mahan Memorial Foundation, which provides scholarships to graduating seniors at Wiggins […]

  • St. Jude Walk/Run

    Auraria Tivoli Quad 1000 Larimer St, Denver, CO, United States

    Event Description: St. Jude Walk/Run is a family friendly 5K event, taking place at Dick’s Sporting Goods Park on September 23rd. Participants come together during Childhood Cancer Awareness Month to help support the lifesaving mission of St. Jude: Finding cures. Saving children®. Other details: Registration is free and participants are encouraged to share their fundraising page […]

    Free
  • Move Forward 5K/10K

    Regis University 3333 Regis Blvd Denver CO, Denver, CO, United States

    The Move Forward 5K/10K is an event created by the Doctor of Physical Therapy students at Regis University as a community outreach project. The proceeds from the event will benefit Canine Companions for Independence and the Foundation for Physical Therapy.

  • Mountain Marmot Trail Run

    Purgatory Resort 1 Skier Place, Durango, CO, United States

    Have you ever stood at the bottom of a mountain, staring up at the top, thinking to yourself: “I wonder if I could run all the way up there?” Well, now you’re going to find out! The Mountain Marmot Trail Run is an epic trail race. The course is simple — start at the bottom […]

  • Montbello Alive! 5K

    Parkfield Lake Park 15555 E 53rd Ave, Denver, CO, United States

    Join us for the Montbello Alive 5K, a vibrant community event that brings together runners, walkers, and families for a day of fun, wellness, and celebration. This race is part of the Montbello Alive! celebration, an annual event for our thriving community's culture, spirit, and togetherness. Whether you're an experienced runner aiming for a personal […]

  • Rock Cut Estes Park 5K

    Rock Cut Brewing Company 390 W Riverside Drive, Estes Park, CO, United States

    Join us for The Rock Cut Estes Park 5k on September 20, 2025, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Estes Park. Run, walk, jog - whatever goes! Complete the course and celebrate with us and a FREE, local craft brew at the finish line. Start windows […]

  • RMRR Fall Marathon Training Series

    RMRR Marathon Training Series
    Riverwalk Ballfields 9830 Riverdale Rd, Thornton, CO, United States

    RMRR’s Marathon Training Series provides 10M and 20M races that are low cost, friendly, fully supported, and officially timed.  All you need to do is focus on your running!  Our races fit perfectly in training schedules for Colfax, Boston, New York, Chicago, and other full and half marathons. Everyone is welcome at our MTS races:  RMRR members, […]

  • Be Ovary Aware 5K

    America the Beautiful Park Cimino Dr, Colorado Springs, CO, United States

    Raise awareness for ovarian cancer and raise funds to support Coloradans with 7 different types of gynecologic cancers: Ovarian, fallopian tube, uterine/endometrial, cervical, vaginal, vulvar and peritoneal cancers. This event benefits Sue Gift - Gynecologic Cancer Support.

  • Tiger Prowl 5K

    Lakewood High School 9700 W. 8th Avenue, Lakewood, CO, United States

    The Tiger Prowl 5K is a fabulous annual community event and tradition run by the Lakewood High School Foundation to support all the talented and ambitious student programs offered. All proceeds go back into Lakewood High School programs for the students including theater, musical performance groups, athletics and the many other LHS clubs. ​Donations to […]

  • 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.