Event details subject to change. Please confirm all information via event website.
Rocky’s Backyard Ultra
YMCA of the Rockies - Estes Park 2515 Tunnel Rd., Estes Park, CO, United StatesRocky's Backyard Ultra is a challenging Ultra Trail race hosted in beautiful Estes Park, Colorado. We strive to host a challenging event that is welcoming and motivating to all. "One More Lap" The Backyard Ultra is a form of Ultra Trail race where runners must complete 4.167 miles in less than one hour, every hour, until only one […]
Riverside Ramble
High Side Bar and Grill 300 W Sackett, Salida, CO, United StatesThe Alliance and 7000ft Running Company present The Riverside Ramble! The Riverside Ramble is an accessible fun run that celebrates survivors in the outdoor community and emphasizes the necessity for safety in all spaces. Sexual violence is prevalent in outdoor recreation and the outdoor industry. According to a 2018 survey by Outside Magazine, 70% of […]
Canceled bRUNch Run 5K/10K
Stapleton Central Park 8801 Martin Luther King Jr Blvd, Denver, CO, United StatesThe bRUNch Run ™ is back! Join us in Denver for the most epic and delicious 5K + 10K run/walk. (There is also the 15K)! Think road race meets food festival... join us for a morning of cheering runners on, finish line high fives and hugs, tears of joy, the only race with a scented […]
Westy Half and 5K
Westminster Promenade 10600 Westminster Blvd, Westminster, CO, United StatesJoin the WESTY HALF and 5k this fall! The Hometown Race Series features half marathons and 5k distance events in outlying communities outside the Denver and Boulder metro areas. Whatever distance you're ready to tackle, we'll be there with you to celebrate at the finish line! This is one of the few 5k events where FINISHER […]
Breakthrough T1D Walk
City Park - Denver 1700 N York St, Denver, CO, United StatesAs the leading global type 1 diabetes (T1D) research and advocacy organization, Breakthrough T1D has played a crucial role in nearly every major T1D breakthrough in history. No organization does more to improve everyday life with T1D—from therapy development and access, to expanding research, advocacy, and community support. Breakthrough T1D Walk is the world’s largest […]
Highland Homecoming 5K
Highland High School 210 W First St, Ault, CO, United StatesJoin us for the Annual Highland Homecoming 5k Run & Walk. This race benefits the middle and high school cross-country teams.
EDT XC Showdown
Aurora Sports Park 19300 E Colfax Avenue, Aurora, CO, United StatesWhether you run for a team, as an individual, or you just want to try out the experience of running a cross country race, you are welcome to join us for the 2024 Elevated XC Showdown! Boys/Girls will run in combined races, and will be separated by age groups below. All courses utilize the same […]
Run the Rocks 5K/10K
Red Rocks Amphitheatre 18300 W Alameda Pkwy, Morrison, CO, United StatesLet every step you take make a profound impact on lung health and clean air in Colorado! The American Lung Association in Colorado proudly offers the only timed race event at the iconic, gorgeous Red Rocks Park & Amphitheatre. This unique run/walk challenge combines breathtaking scenery and a rock ‘n roll vibe for our 5K […]
Boulder Skyline Traverse
Runners Roost - Boulder 629 S Broadway, Boulder, CO, United StatesThe Boulder Skyline Traverse is a ~18 mile trail route that covers the 5 peaks of Boulder (South Boulder Peak, Bear Peak, Green Mountain, Flagstaff Mountain, and Mt. Sanitas). You'll gain roughly 5,600 ft of vert! The route is intermediate to advanced! All levels are welcome, but our shuttle service will be cut off at […]
Blue Sky Trail Marathon
Blue Sky Trailhead County Road 38e, Fort Collins, CO, United StatesTaking place on the trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space, the Blue Sky courses take you on a north-south tour of the easternmost hogbacks of Northern Colorado’s Front Range mountains. With a moderate amount of elevation gain and loss and a variety of terrain, the route offers a little bit […]
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.