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16
Volunteer Sign-Up - Superior Time-Trial
Sat, May 16, 2026Boulder, United States
17
MT Sopris Run-Off
Sun, May 17, 2026Carbondale, United States
17
Miles for Smiles 5K
Sun, May 17, 2026Arvada, United States
17
Healing Warriors Program 2026 Annual 5K Fun Run
Sun, May 17, 2026Fort Collins, United States
17
Guzi's Hunt for the Cure Run/Walk
Sun, May 17, 2026Oak Creek, United States
17
Canine On the Creek
Sun, May 17, 2026Dumont, United States
17
2026 Colfax Marathon - Relay Team Member Waiver
Sun, May 17, 2026Denver, United States
17
Superior Morgul Road Race
Sun, May 17, 2026Boulder, United States
19
Dash & Dine 5k #4 - Series Finale
Tue, May 19, 2026Boulder, United States
20
AdventHealth Race to Rebuild
Wed, May 20, 2026Lone Tree, United States
20
HRCA Highlands Point Circuit
Wed, May 20, 2026Highlands Ranch, United States
21
Glas Deffryn Ranch Junior MTB XC
Thu, May 21, 2026Oak Creek, United States
22
8th Annual Angel Run at Red Leg Brewing
Fri, May 22, 2026Colorado Springs, United States
23
Rae of Sunshine 5K - Umbrella Alley
Sat, May 23, 2026Louisville, United States
23
Samson's Revenge
Sat, May 23, 2026Estes Park, United States
23
Suffer on Centennial
Sat, May 23, 2026Black Hawk, United States
23
Acoma Sky City Jamboree
Sat, May 23, 2026Pueblo, United States
23
Mile High Mile
Sat, May 23, 2026Boulder, United States
23
2026 — Run for Mental Health 5K/10K/13.1 DENVER/AURORA
Sat, May 23, 2026Aurora, United States
23
2026 — Memorial Day Run 5K/10K/13.1 DENVER/AURORA
Sat, May 23, 2026Aurora, United States
23
The Original Growler Endurance Mountain Bike Races
Sat, May 23, 2026Gunnison, United States
23
Friends of FoCo Fondo x Fort Follies Skills Clinic
Sat, May 23, 2026Fort Collins, United States
24
2026 CKF Cape Town Marathon
Sun, May 24, 2026Aspen, United States
25
Nina LeCuyer Memorial 5K
Mon, May 25, 2026Sheridan, United States
25
5th Annual Angel Run at Red Leg Brewing
Mon, May 25, 2026Colorado Springs, United States
25
Smiles for Miles Memorial Day Fun Run - Sponsored by Dignity Memorial - Supporting Operation School Bell
Mon, May 25, 2026Pueblo, United States
27
2026 Summit Mountain Challenge
Wed, May 27, 2026Breckenridge, United States
29
The Grand Loop
Fri, May 29, 2026Nucla, United States
30
North Fork 50 Mile/50K
Sat, May 30, 2026Buffalo Creek, United States
30
Rae of Sunshine 5K - Umbrella Alley
Sat, May 30, 2026Louisville, United States