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Leadville Marathon and Heavy Half
Leadville 135 E. 6th Street, Leadville, CORun through the historic mining district’s challenging old mining roads and trails, and hit a high of 13,185 feet at Mosquito Pass during the Life Time Leadville Trail Marathon and …
Silver Rush 50 Run
Take on 50 miles of extreme territory that starts at 10,200 feet and reaches 12,000 feet on four separate occasions at the Life Time Silver Rush 50 Run presented by …
Barr Lake Trail Race
Barr Lake State Park (Nature Center) 13401 Picadily Rd, Brighton, CO, United StatesThis 6th Annual event showcases a course that is our flattest and fastest on the ERS schedule with less than 100' of elevation gain per loop. Runners will start and …
Dirt Circus
Runners Roost - Boulder 629 South Broadway, Suite E, Boulder, CO, United StatesThe Dirt Circus sponsored by UltraSignUp will be hosting the Colorado event at the Runners Roost in Boulder. Join multiple trail brands, race directors, and gear reps for an expo …
Leadville 10K Run
Leadville 135 E. 6th Street, Leadville, COHeld the weekend of the historic Stages Cycling Leadville Trail 100 MTB, the Leadville 10K Run is the shortest run in the series, but covers the first and last 3.1 …
Leadville Trail 100 Run
Leadville 135 E. 6th Street, Leadville, COThe legendary “Race Across The Sky” 100-mile run is where it all started back in 1983. This is it. The race where legends are created and limits are tested. One …
Westminster Trail Race
Wayne Carle Middle School @ Standley Lake 10020 100th Ave, Westminster, Westminster, CO, United StatesJoin us at beautiful Standley Lake in Westminster as we race around the lake. The 12th Annual event is a great course for those competitive, intermediate, or novice runners. The …
Calarat Challenge Trail Running Festival
Join us Labor Day weekend for the Calarat Challenge Trail Running Festival. We start the festivities off on Saturday night with a 5K that you can run, walk or hike, …
Trail Sisters Half Marathon
13.1 trail miles that twist and turn through sage brush and ponderosa pines, all while providing stunning views of the Collegiate Peaks. Located in the Rocky Mountains along the roaring …
Snow Mountain Ranch Festival
YMCA of the Rockies Granby (Nordic Center) 1101 County Rd 53, Granby, United StatesThe YMCA of the Rockies in Granby hosts the 11th annual Snow Mountain Ranch Trail Running Festival. The Season Finale to the Summer Series. Races will include a Half Marathon,10K, …