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Running Events in Colorado 2025-2026
4
Greeley Freedom 5k Walk & Run
Greeley, US
Fri 4th Jul 2025
10
The Alma Foundation Race in the Clouds Dirt Festival
Alma, US
Thu 10th Jul 2025
11
Silverheels Trail Runs
Como, US
Fri 11th Jul 2025
12
All-Out Dog Days
Westminster, US
Sat 12th Jul 2025
12
Grin & Bear It
Crested Butte, US
Sat 12th Jul 2025
16
STRS #4 - Tom's Baby Turnaround
Breckenridge, US
Wed 16th Jul 2025
19
All American 4 & 8 Mile - Denver
Westminster, US
Sat 19th Jul 2025
19
Audi Power of Four Trail Run
Aspen, US
Sat 19th Jul 2025
19
Summer Splash Prairie Dog Half, 10k, & 5k
Castle Rock, US
Sat 19th Jul 2025
20
All American 4 & 8 Mile - Colorado Springs
Colorado Springs, US
Sun 20th Jul 2025
25
Never Summer 100km & 60km
Walden, US
Fri 25th Jul 2025
30
STRS #5 - Carter Park Scurry
Breckenridge, US
Wed 30th Jul 2025
2
Sheep Mountain Trail Runs
Fairplay, US
Sat 2nd Aug 2025
2
All-Out Runapalooza
Arvada, US
Sat 2nd Aug 2025
3
Bound for Boston Marathon & Half Marathon - Denver
Denver, US
Sun 3rd Aug 2025
9
Holy COW Trail Stampede
Westminster, US
Sat 9th Aug 2025
16
2025 CKF Leadville Trail 100 Run
Aspen, US
Sat 16th Aug 2025
16
Summer Sizzler- Denver
Denver, US
Sat 16th Aug 2025
17
Erie Half & 5k
Erie, US
Sun 17th Aug 2025
17
Summer Sizzler- Colorado Springs
Colorado Springs, US
Sun 17th Aug 2025
6
HRCA Wildcat Mountain Trail Races
Littleton, US
Sat 6th Sep 2025
6
Black Squirrel Half Marathon
Bellvue, US
Sat 6th Sep 2025
13
All-Out Fall Fest
Westminster, US
Sat 13th Sep 2025
13
Spooky Sprint - Colorado Springs
Colorado Springs, US
Sat 13th Sep 2025
13
The Denver 5k
Denver, US
Sat 13th Sep 2025
14
Spooky Sprint - Denver
Denver, US
Sun 14th Sep 2025
20
Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon
Cañon City, US
Sat 20th Sep 2025
20
Miles 4 Madison 5K & 1K
Littleton, US
Sat 20th Sep 2025
26
Red Feather Trail Jamboree
Red Feather Lakes, US
Fri 26th Sep 2025
27
HRCA Oktoberfest 5K
Highlands Ranch, US
Sat 27th Sep 2025
27
Pioneer Prairie Dog Half, 10k & 5k
Westminster, US
Sat 27th Sep 2025
27
West Line Winder
Buena Vista, US
Sat 27th Sep 2025
27
Break Your Neck: Walk, Run, or Roll
Pueblo, US
Sat 27th Sep 2025
27
Sangre de Cristo Trail Festival
Westcliffe, US
Sat 27th Sep 2025
27
Toughest Mudder Colorado
Fort Carson, US
Sat 27th Sep 2025
30
Center of the Nation Series - Day 2 (CO)
Sterling, US
Tue 30th Sep 2025
4
Colorado Springs Marathon, Half, 5K, and Kids K
Colorado Springs, US
Sat 4th Oct 2025
5
Windsor Marathon, Half Marathon, 10k & 5k
Windsor, US
Sun 5th Oct 2025
11
Breckenridge Road Marathon
Breckenridge, US
Sat 11th Oct 2025
12
The bRUNch Run™
Denver, US
Sun 12th Oct 2025
18
Indian Creek Trail Runs
Sedalia, US
Sat 18th Oct 2025
18
The Great Trailhead Foot Race 5 & 10 Miler
Lakewood, US
Sat 18th Oct 2025
18
Blue Sky Trail Marathon & Half Marathon
Fort Collins, US
Sat 18th Oct 2025
1
City Park 5k & 1 Mile Walk of Hope for Pancreatic Cancer Research
Denver, US
Sat 1st Nov 2025
1
Turkey Trails - Colorado Springs
Colorado Springs, US
Sat 1st Nov 2025
2
All-Out Kooky-Spooky
Jefferson County, US
Sun 2nd Nov 2025
8
HRCA Backcountry Wilderness Half Marathon
Lone Tree, US
Sat 8th Nov 2025
8
BINGO! Trail Party
Byers, US
Sat 8th Nov 2025