Run This

Race calendar

5K Races in Boulder, CO

4 upcoming 5K races in Boulder. Run This events are listed first.

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DistanceAll5K10KHalf MarathonUltra
Nearby citiesDenverColorado SpringsCentennialLittletonFort CollinsWestminsterArvadaPuebloThorntonLovelandGrand JunctionAurora

4 races

Sat, Sep 26, 2026

Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado

Boulder, CO

OutsideMarathon5K10K

Wed, Nov 25, 2026

Alpine Bank Boulder Thanksgiving Day 5K

Boulder, CO

Outside5K800 m

Wed, Dec 30, 2026

Hands & Voices New Year Virtual 5K: Trails to the Summit

Boulder, CO

Outside5K

Sat, May 1, 2027

Emerge 5K

Boulder, CO

Outside5K

Other cities in Colorado

Denver37Colorado Springs29Centennial28Littleton15Fort Collins14Westminster12Arvada11Pueblo8Thornton8Loveland7Grand Junction6Aurora5Buena Vista5Durango5Louisville5Windsor5Bellvue4Golden4Steamboat Springs4Broomfield3Estes Park3Greeley3Highlands Ranch3Manitou Springs3Pagosa Springs3Palmer Lake3Parker3Pine3Red Feather Lakes3