Event details subject to change. Please confirm all information via event website.
CMRA Elk Meadow Trail Run
Elk Meadow Park 2855 Bergen Peak Drive, Evergreen, CO, United StatesCome up to scenic Elk Meadow Open Space for an exhilarating 5.1 mile trail run. This is a timed event that starts and ends near the Lewis Ridge Trail Head.
Grin & Bear It Trail Race
Crested Butte Nordic Center 620 2nd St, Crested Butte, CO, United StatesThe 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 Loop competition while still maintaining the traditional 15k race. This is a low swag, no frills race.
Race in the Clouds Dirt Festival
Buckskin Cemetery 227 Buckskin Street, Alma, CO, United StatesGet ready for a day of exciting outdoor activities at 10,600 feet in beautiful Alma, Colorado! Our dirt festival has something for everyone: mountain bike racing, trail running, a free kids' bike race, an OFF-Road Duathlon (Run + Bike) and camping in a stunning meadow surrounded by 14,000-foot mountain peaks. What are the courses like?? […]
NoCo All-Comers Track Meet #3
Loveland High School 920 West 29th St., Loveland, CO, United StatesThis is the third in a series of four track meets in Northern Colorado during the summer of 2025. The meet will take place at Loveland High School and features a variety of track events including: 8:00 am: Elite Women's 1 Mile Run 8:20 am: 1 Mile Run 8:40 am: Kids 50m Dash 9:00 am: […]
High Lonesome 100
County Road 321 Nathrop, CO, United StatesThe High Lonesome 100 is a high flying endurance race in the Sawatch range of the Colorado Rocky Mountains. With 22,500' of vertical gain and reaching an elevation of 13,150', it's a hell of a course. The race runs in a loop through some of the most beautiful single track in the state, and takes runners on the Continental Divide and Colorado Trail, through 2 ghost towns, over 5 alpine passes, through remote basins, and over soaring ridges. This year's event takes place on July 30th.
Aspen Valley Marathon
Lions Park 101 Midland Ave, Basalt, CO, United StatesMark your calendars – Don’t miss out on this exhilarating race through the stunning landscapes of Aspen, Colorado! Join us for a one-of-a-kind experience that you’ll cherish forever. The Aspen Valley Marathon takes place in the heart of the Rocky Mountains. The marathon is a Boston Marathon qualifier, offering runners the opportunity to qualify for […]
Audi Power of Four Trail Race
Aspen Mountain 601 East Dean Street, Aspen, CO, United StatesThe 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 designed to test the limits and skills of both elite and recreational athletes. The event’s signature race is a challenging 50K Ultra is part of […]
Kids’ TRY-athlon
H2O'Brien Pool 10795 Victorian Dr, Parker, CO, United StatesThis event is all about fun over competition. Boys and girls of all ability levels show their skills in three events: swimming, biking and running. Come on, kids, TRY it out! Ages: 6 to 12, based on event date Event Distances 6-7 years: 25m swim (1 length)/ 0.75 mile bike/ .5 mile run 8-10 years: 50m […]
Canceled Powderhorn Mountain Ultra
Powderhorn Mountain Resort 48338 Powderhorn rd, Mesa, CO, United StatesThe Powderhorn 6 or 12-Hour Mountain Ultra is here to challenge your endurance, strength, and willpower with two exciting options. Whether you're a trail-running/hiking enthusiast or a vertical-climbing beast, we have the perfect course for you. Nestled in the stunning Colorado mountains on Grand Mesa, Powderhorn Ski Resort offers unparalleled views and the rugged terrain […]
Spring Creek Memorial Trail Run
Spring Creek Trailhead Steamboat Springs, CO, United StatesThis race is held in memory of Patty Brenner Hagberg who was struck and killed by a truck along the lower part of the trail in 1991. This race should remind all of us the importance of sharing multi-purpose use trails. The race is held on the beautiful Spring Creek trail with wildflowers and Aspen […]
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.