123 Upcoming 5K Races Near Thornton, CO

Sat, Jul 17, 20272 races

Heatwave Half Marathon/5K/10K - Denver

Denver, CO

Summer Splash Prairie Dog Half, 10k, & 5k

Castle Rock, CO

Sun, Jul 25, 20271 race

Spirit of the West 5K Run/Walk

Golden, CO

Sat, Aug 7, 20273 races

All-Out Runapalooza

Arvada, CO

Unicorn 5k (South)

Highlands Ranch, CO

Summer Sizzler- Denver

Denver, CO

Sun, Aug 15, 20271 race

Erie Half & 5k

Erie, CO

Mon, Aug 16, 20271 race

Sat, Aug 21, 20272 races

Ram Run 5K

Denver, CO

Byers Peak Stampede Half Marathon & 5K Run

Fraser, CO

Sun, Aug 22, 20271 race

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Mon, Sep 6, 20271 race

Labor Day Half Marathon

Parker, CO

Sat, Sep 11, 20272 races

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

Denver, CO

The Denver 5k

Denver, CO

Sat, Sep 18, 20271 race

All-Out Fall Fest

Westminster, CO

Sat, Oct 2, 20273 races

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

Westminster, CO

The Extra Mile 5K

Englewood, CO

Spooky Sprint - Denver

Denver, CO

Sun, Oct 10, 20271 race

Westy Half & 5k

Westminster, CO

Sat, Oct 16, 20271 race

Running Scared 5K/13K - Denver

Littleton, CO

Sun, Oct 24, 20272 races

The 15th Annual Odyssey Odyssey - 2026

Denver, CO

Ghosts and Goblins 5K

Denver, CO

Mon, Sep 2, 20301 race

Conifer Climb

Conifer, CO