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Colorado

Here's a full listing of races and events in Colorado.

Visit these pages for just marathons, half marathon, 10K or 5K races.

featured races

Currently there are no featured events for this state.

running & multisport races

Heart Throb 5K
Road Running
Feb 14, 2026
Arvada
Stories Trail Runs
Trail Running
Feb 21, 2026
Colorado Springs
Highlands Ranch 5k/10k
Road Running
Feb 22, 2026
Highlands Ranch
Erin Go Bragh 7.77k
Road Running
Mar 14, 2026
Westminster
The Central Park 5K
Road Running
Mar 22, 2026
Denver
Spring Equinox Half Marathon & 5k
Road Running
Mar 29, 2026
Wellington
Cayson Pearson Memorial 5K Run/Walk
Road Running
Apr 4, 2026
Lakewood
Desert Rats Trail Running Festival
Trail Running
Apr 9, 2026
Fruita
NoCo Urban Ultra & Relay
Trail Running
Apr 11, 2026
Spring Fling Prairie Dog Half Marathon 10K & 5K
Road Running
Apr 12, 2026
Arvada
Donut Dash
Road Running
Apr 12, 2026
Denver
Rattler Trail Races
Trail Running
Apr 18, 2026
Colorado Springs
Horsetooth Half Marathon
Road Running
Apr 19, 2026
Fort Collins
Unicorn 5k (Denver - East)
Road Running
Apr 26, 2026
Denver
Take 5 in the Garden of the Gods
Trail Running
May 2, 2026
Colorado Springs
Greenland Trail Races
Trail Running
May 2, 2026
Colorado Springs
Hope House 5K & Fun Run
Road Running
May 2, 2026
Arvada
Longmont Half Marathon & 5K
Road Running
May 3, 2026
Longmont
Valkyrie Trail Race
Trail Running
May 9, 2026
Colorado Springs
Quad Rock 25 & 50 Mile Trail Races
Trail Running
May 9, 2026
Fort Collins
Colorado Women's Classic 10 Miler, 5k/10k
Road Running
May 10, 2026
Westminster
Sharin' O' The Green 5k
Road Running
May 14, 2026
Fort Collins
Endure Trail Runs
Trail Running
May 16, 2026
BOLDERBoulder 2026
Road Running
May 25, 2026
Boulder
Weld Your Mettle Running Festival
Trail Running
May 30, 2026
Ragnar Trail Colorado
Trail Running
Jun 5, 2026
Snowmass Village
Summits Trail Runs
Trail Running
Jun 6, 2026
Colorado 13er
Trail Running
Jun 7, 2026
Boulder
Unicorn 5k (Denver - North)
Road Running
Jun 20, 2026
Thornton
Father's Day Classic
Road Running
Jun 21, 2026
Arvada
Let Freedom Run - LONGMONT
Road Running
Jul 4, 2026
Longmont
Let Freedom Run - Louisville
Road Running
Jul 4, 2026
Louisville
Telluride Foundation Rundola
Trail Running
Jul 4, 2026
Telluride
Silverheels Trail Runs
Trail Running
Jul 10, 2026
Silver Rush 50 Run
Trail Running
Jul 11, 2026
Leadville
High Lonesome 100
Trail Running
Jul 17, 2026
Silverton Alpine Runs
Trail Running
Jul 18, 2026
Silverton
Summer Splash Prairie Dog Half Marathon, 10k & 5k
Road Running
Jul 18, 2026
Castle Rock
Aspen Valley Marathon
Road Running
Trail Running
Jul 18, 2026
Aspen
Kendall Mountain Run
Trail Running
Jul 19, 2026
Silverton
Box Canyon Trail Races
Trail Running
Jul 25, 2026
Telluride
Pikes Peak Ultra
Trail Running
Jul 25, 2026
Colorado Springs
Rocky Mountain Half & 5K
Road Running
Aug 1, 2026
Boulder
Unicorn 5k (South)
Road Running
Aug 1, 2026
Highlands Ranch
Leadville Trail 10K
Trail Running
Aug 16, 2026
Leadville
Erie Half & 5K
Road Running
Aug 16, 2026
Leadville Trail 100 RUN
Trail Running
Aug 22, 2026
Leadville
Telluride Mountain Run
Trail Running
Aug 22, 2026
Telluride
Pioneer Prairie Dog Half Marathon, 10K & 5K
Road Running
Aug 23, 2026
Westminster
Rock Hawk Trail Races
Trail Running
Aug 29, 2026
Denver

featured events

Yakima River Canyon Marathon and Half-Marathon
Mar 28, 2026
/
Yakima
Corvallis Half Marathon & 5K
Apr 11, 2026
/
Corvallis
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