Event details subject to change. Please confirm all information via event website.
RexRun 5K for PAWSitivity
The RexRun 5K is a 5K run/walk to spread mental health awareness and #PAWSitivity in schools with the help of more Therapy K-9's like Arapahoe County Sheriff's Office K-9 Rex. This year's event is at Dove Valley Park in Centennial on August 6th.
Boulder Sunset 5K/10K
The Boulder Sunset 10K & 5K Run is part of BBSC’s biggest endurance event of the summer. Spend your weekend racing with BBSC at the incredible and scenic Boulder Reservoir. Register, and start training for the end-of-the-summer endurance festival with BBSC.
Thirsty 13 Half Marahton
It's a race. It's a Brewfest. It's the Thirsty 13 Half Marathon! Are you thirsty for gorgeous scenery? You won't find a course more beautiful than this one. With the majestic La Plata mountains in the background, you'll cruise through the lush pastures of Wildcat Canyon and past the pristine waters of Lake Nighthorse. This […]
Rocky Mountain 5K
In partnership with the YMCA Pikes Peak Region, we want to bring you the annual Rocky Mountain Run, the Rocky Mountain State Games official 5k! Athletes will be looped around Memorial Park starting at the IAFF Fallen Firefighters Memorial then head through the side streets of Memorial Park, around Prospect Lake, and finish back at […]
Run Like The Wind 5K
Come race in the mountain town of Allenspark Colorado. Run the scenic 5K that circles through downtown and along dirt roads amid pine forest, boasting awe inspiring views of Mount Meeker and the Continental Divide. Enter your dog to run with you for an extra $5 and stick around for the post-race whimsical dog show. […]
Ouray 50 Mile
A 50 That's More Difficult Than Your Last 100 How do you build a 50 miler that hits harder than most 100 milers? Easy. Start with a stout mountain hundred miler. Anything with ~24k feet of climbing should do. Find 50 miles of flat and discard it. Add copious amounts of highly-technical, unforgiving, why-would-they-even-think-this-is-a-good-idea trails. […]
RMRR Fall Marathon Training Series
Riverwalk Ballfields 9830 Riverdale Rd, Thornton, CO, United StatesRMRR’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, […]
Bluffs 8K Trail Run
Prairie Sky Park 10249 Ridgegate Circle, Lone Tree, CO, United StatesThe Bluffs 8K Trail Race has rolling hills and beautiful views as you run or walk through the Bluffs Regional Park. The race will start/finish near the Prairie Sky parking lot o n August 28th.
Wine Run 5K
Join us on Sunday, August 30, 2026 for an exciting annual event that features the amazing scenery and landscape of The Winery At Holy Cross Abbey! Due to the huge turnout, we will have 2 start times for the event (9:30am and 11am). You'll select a start time when you sign up. Since July 2002, […]
Lakewood Trail Running Series I
Bear Creek Lake Park 15600 W Morrison Rd, Lakewood, CO, United StatesThe popular trail running series in Bear Creek Lake Park takes place weekly in September. Different routes allow participants to explore all areas of the park. Racers can compete against others in-person on Wednesday evenings, or run the marked course on their own Tuesday-Thursday weekly for a virtual option.
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