174 Upcoming Races Near Thornton, CO

Thu, Aug 5, 20271 race

Eldorado Run for the Cure

Eldorado Springs, CO

Sat, Aug 7, 20274 races

Summer Sizzler- Denver

Denver, CO

1 Mile, 5K, 10K

Unicorn 5k (South)

Highlands Ranch, CO

5K

Dog Days of Summer

Longmont, CO

All-Out Runapalooza

Arvada, CO

Half, 10K, 5K

Sun, Aug 15, 20271 race

Erie Half & 5k

Erie, CO

Half, 5K

Mon, Aug 16, 20271 race

Sat, Aug 21, 20272 races

Byers Peak Stampede Half Marathon & 5K Run

Fraser, CO

Half, 5K

Ram Run 5K

Denver, CO

5K, 1 Mile

Sun, Aug 22, 20271 race

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Half, 10K, 5K

Mon, Sep 6, 20271 race

Labor Day Half Marathon

Parker, CO

Half, 10K, 5K

Sat, Sep 11, 20272 races

Golden Harvest Half Marathon & 5K/10K - Denver

Denver, CO

1 Mile, 5K, 10K

The Denver 5k

Denver, CO

5K

Sat, Sep 18, 20271 race

All-Out Fall Fest

Westminster, CO

Half, 10K, 5K

Sat, Oct 2, 20273 races

Spooky Sprint - Denver

Denver, CO

1 Mile, 5K, 10K

The Extra Mile 5K

Englewood, CO

5K

Not So Flatt Breast Cancer Awareness Run/Walk – 5K & 10K in Denver, CO

Westminster, CO

5K, 10K

Sun, Oct 10, 20271 race

Westy Half & 5k

Westminster, CO

Half, 5K

Sat, Oct 16, 20273 races

Indian Creek Trail Runs

Sedalia, CO

The Great Trailhead Foot Race 5 & 10 Miler

Lakewood, CO

10 Miles

Running Scared 5K/13K - Denver

Littleton, CO

5K

Sun, Oct 24, 20272 races

The 15th Annual Odyssey Odyssey - 2026

Denver, CO

5K, 1 Mile

Ghosts and Goblins 5K

Denver, CO

5K

Mon, Sep 2, 20301 race

Conifer Climb

Conifer, CO

Ultra, 5K