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Running Calendar near Denver 2026-2027

Monthly updates for Denver

Get new running races (and updates) in your inbox every month.

Explore the top running races near Denver for 2026-2027! We've gathered 260 exciting races in the area. Check out our detailed list below to find your next local race.

Half Marathons Marathons Trail Runs Triathlons Fitness Races
May 2026
May
19
Tu

Dash & Dine 5k

5 km
May
20
We

Race to Rebuild

May
23
Sa

The Best Races - Centennial

5 km 10 km 13 mi
May
23
Sa

GMR Backyard Ultra

Backyard Ultra 4 mi
May
23
Sa

Mile High Mile

May
24
Su

Idaho Springs Pack Burro Race

5 mi
May
25
Mo

BOLDERBoulder 10K

10 km
May
30
Sa

North Fork 50 Mile

Trail Run 50 km 50 mi
May
30
Sa

Denver DEKA FIT & Ultra

Fitness
May
30
Sa

Pasta Run

5 km 10 km Half Marathon
May
30
Sa

DRMABPsi Walk, Run & Roll 5K

3 km 4 km 5 km
May
30
Sa

Elk Meadow 10K Trail Race

Trail Run 5 km
May
31
Su

Harvest Moon Triathlon

Triathlon
May
31
Su

Rueter-Hess Trail Run

Trail Run 10 km
June 2026
Jun
6
Sa

The Best Races - Centennial

5 km 10 km 13 mi
Jun
6
Sa

Centennial Airport Runway 5K

5 km
Jun
6-14
Sa - Su

2 for 22q Walk/Run/Ride

2 mi 5 km
Jun
6
Sa

Haul Ass Ultra Running Festival

Trail Run 5 km 10 km 50 km 50 mi
Jun
7
Su

Flamingo Day 5K

5 km
Jun
7
Su

Colorado 13er Half Marathon

5 km 10 km 13 mi
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