Run This

Race calendar

Running Races in Longmont, CO

3 upcoming races in and around Longmont. Run This events are listed first — jump to a specific distance below.

Sort
Search all races
DistanceAll5K
Nearby citiesDenverColorado SpringsCentennialFort CollinsLittletonArvadaWestminsterPuebloAuroraBoulderLovelandThornton

3 races

Sat, Oct 17, 2026

Longmonster Dash 5k

Longmont, CO

Outside5K

Sat, Nov 7, 2026

12th edition Sole Mates 5k & Brew Fest presented by Shoes & Brews and Left Hand Brewing

Longmont, CO

Outside5K

Sat, Aug 7, 2027

Dog Days of Summer

Longmont, CO

Outside3.5 mi1000 m

Own a race in Longmont?

List it on Run This and it shows up right here, where runners are already looking. Run This is any race director's best friend and the most modern platform for your registration. Already listed? Claim it.

List your race

Other cities in Colorado

Denver44Colorado Springs40Centennial31Fort Collins19Littleton16Arvada12Westminster11Pueblo9Aurora8Boulder8Loveland8Thornton8Buena Vista6Grand Junction6Windsor6Durango5Louisville5Steamboat Springs5Estes Park4Golden4Greeley4Aspen3Bellvue3Broomfield3Manitou Springs3Pagosa Springs3Palmer Lake3Parker3Red Feather Lakes3