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105 Running Colorado

Rise Against Suicide - Emerge 5K 2026 - Boulder, CO - running-17.png

Rise Against Suicide - Emerge 5K 2026

Boulder, CO

Sun - May 03, 2026

Water Wells for Africa 5k Walk/Run - Silt, CO - genericImage-websiteLogo-248835-1740583115.1721-0.bNVZdl.jpg

Water Wells for Africa 5k Walk/Run

Silt, CO

Sun - May 03, 2026

Longmont Half Marathon & 5k - Longmont, CO - 7.2021-LM-Half-TRNSP.png

Longmont Half Marathon & 5k

Longmont, CO

Sun - May 03, 2026 @ 7:30 AM

Running > 5k, Half Marathon

The Great CO74 Trail Run - Kittredge, CO - genericImage-websiteLogo-276357-1773093078.2045-0.bPR0dw.png

The Great CO74 Trail Run

Kittredge, CO

Sat - May 09, 2026

Running > Obstacle Race

Kadet Football 5K - Colorado Springs, CO - genericImage-websiteLogo-279827-1775662343.6937-0.bP1Nuh.png

Kadet Football 5K

Colorado Springs, CO

Sat - May 09, 2026

Celebration of Moms 5k & Family Fun Run - Buena Vista, CO - running-2.png

Celebration of Moms 5k & Family Fun Run

Buena Vista, CO

Sat - May 09, 2026

CEROX IRON + IRON X - Frederick, CO - genericImage-websiteLogo-265479-1760198988.197-0.bO6Ofm.png

CEROX IRON + IRON X

Frederick, CO

Sat - May 09, 2026

Colterris Wine Run 5k - Palisade, CO - colterris-wine-run-5k-logo_occhHzU.png

Colterris Wine Run 5k

Palisade, CO

Sat - May 09, 2026 @ 09:30

Super Mom 5K/10K/Half - Colorado Springs - Colorado Springs, CO - genericImage-websiteLogo-271970-1771978827.1355-0.bPNKbl.png

Super Mom 5K/10K/Half - Colorado Springs

Colorado Springs, CO

Sun - May 10, 2026

Running > Half Marathon, 5k, 10k

Super Mom 5K/10K/Half - Colorado Springs - Colorado Springs, CO - running-3.png

Super Mom 5K/10K/Half - Colorado Springs

Colorado Springs, CO

Sun - May 10, 2026 @ 8:00 AM

Running > 10k, 5k, Half Marathon

Colorado Women's Classic - Westminster, CO - 5.2020-CWC-Button-Blue.png

Colorado Women's Classic

Westminster, CO

May 10, 2026 - Oct 26, 0005 (8:00 AM)

Running > 10k, 10 Mile, 5k

Girls on the Run 5K at Colfax - Running Buddies and Volunteers - Denver, CO - genericImage-websiteLogo-278075-1773760857.0433-0.bPUxfz.png

Girls on the Run 5K at Colfax - Running Buddies and Volunteers

Denver, CO

Sat - May 16, 2026

Black Canyon Ascent - Montrose, CO - genericImage-websiteLogo-273891-1772301593.1447-0.bPOY0z.png

Black Canyon Ascent

Montrose, CO

Sat - May 16, 2026

Running > 5 mile, Walking

Growing Home - Colfax Fundraiser - Denver, CO - genericImage-websiteLogo-249679-1741805402.4426-0.bN0DDA.png

Growing Home - Colfax Fundraiser

Denver, CO

May 16, 2026 - May 17, 2026

The HIKE - Cascade, CO - genericImage-websiteLogo-250125-1741965952.6236-0.bN1eQa.png

The HIKE

Cascade, CO

Sat - May 16, 2026

Healing Warriors Program 2026 Annual 5K Fun Run - Fort Collins, CO - genericImage-websiteLogo-248495-1743787996.5062-0.bN8bFC.png

Healing Warriors Program 2026 Annual 5K Fun Run

Fort Collins, CO

Sun - May 17, 2026

Girls on the Run Rockies Colfax SoleMates 2026 - Denver, CO - genericImage-websiteLogo-269326-1767723671.938-0.bPxvkx.png

Girls on the Run Rockies Colfax SoleMates 2026

Denver, CO

Sun - May 17, 2026

Running > Half Marathon, Marathon

AdventHealth Race to Rebuild - Lone Tree, CO - group-300px.bMjMog.png

AdventHealth Race to Rebuild

Lone Tree, CO

Wed - May 20, 2026

Running > 1 mile

Run Wild! Rabies Free Africa 5K - Virtual, CO - genericImage-websiteLogo-265586-1769213026.2544-0.bPDaXI.jpg

Run Wild! Rabies Free Africa 5K

Virtual, CO

May 22, 2026 - May 25, 2026

Farish Trail Race - Woodland Park, CO - genericImage-websiteLogo-272162-1770316245.8133-0.bPHohv.jpg

Farish Trail Race

Woodland Park, CO

Sat - May 23, 2026

Running > Half Marathon, 5k, 10k, Obstacle Race, 1 mile

Run for Mental Health 5K/10K/13.1 DENVER/AURORA - Centennial, CO - genericImage-websiteLogo-263226-1768464052.5247-0.bPAj60.png

Run for Mental Health 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Sat - May 23, 2026

Running > 5k, 10k, Half Marathon, 1 mile

GMR Backyard Ultra - Golden, CO - genericImage-websiteLogo-277789-1773343354.0151-0.bPSXj6.png

GMR Backyard Ultra

Golden, CO

Sat - May 23, 2026

Smiles For Miles Memorial Day Fun Run - Pueblo, CO - running-13.png

Smiles For Miles Memorial Day Fun Run

Pueblo, CO

Mon - May 25, 2026

DRMABPsi 1–5K Walk, Run & Roll - Denver, CO - genericImage-websiteLogo-278889-1774476996.1398-0.bPXf7e.jpg

DRMABPsi 1–5K Walk, Run & Roll

Denver, CO

Sat - May 30, 2026

Running > 1k, 5k

Dash4Hope 2026 - Greeley, CO - genericImage-websiteLogo-278195-1774471717.2615-0.bPXeOL.png

Dash4Hope 2026

Greeley, CO

Sat - May 30, 2026

Trinidad Wellness Festival 5K - Trinidad, CO - genericImage-websiteLogo-279657-1775495672.4961-0.bP0-N4.png

Trinidad Wellness Festival 5K

Trinidad, CO

Sat - May 30, 2026

2026 Summit Trail Running Series - Frisco, Breckenridge, Dillon, Silverthorne, Copper, Abasin, CO - 6d0162ad-5fb3-4f8d-94ab-886680ef45e2.jpg

2026 Summit Trail Running Series

Frisco, Breckenridge, Dillon, Silverthorne, Copper, Abasin, CO

Jun 3, 2026 - Aug 12, 2026

2026 STRS #1 Scrapyard Scramble - Dillon, CO - running-13.png

2026 STRS #1 Scrapyard Scramble

Dillon, CO

Jun 3, 2026 - Jun 4, 2026

The Red Schoolhouse Run - Louisville, CO - running-6.png

The Red Schoolhouse Run

Louisville, CO

Thu - Jun 04, 2026

Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA - Centennial, CO - genericImage-websiteLogo-262669-1768464755.3032-0.bPAkfZ.png

Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Sat - Jun 06, 2026

Running > 10k, Half Marathon, 5k, 1 mile