Boulder Running Events

Tri Boulder Sprint, Olympic & Long Course

Boulder Reservoir 18 Jul 2026

Boulder Peak Triathlon, Duathlon, & Aquabike

Boulder Reservoir 12 Jul 2026

Harvest Moon Long Course Triathlon

Boulder Reservoir 31 May 2026

Boulder Sunrise Triathlon

Boulder Reservoir 28 Jun 2026

Colorado Triathlon (Sprint, Olympic, Duathlon, & Aquabike)

Boulder Reservoir 6 Jun 2026

Dirt Circus Boulder

Runners Roost (Boulder) 8 Aug 2026

Avery Fall 5k | Avery Brewing | Boulder | 2026 CO Brewery Running Series

Avery Brewing Company 18 Oct 2026

Boulder Rez Marathon

Boulder Reservoir 15 Aug 2026

Wild Provisions 5k | Boulder | 2026 CO Brewery Running Series

Wild Provisions by 4 Noses Brewing Company 27 Jun 2026

Leadville Race Series June Group Run + Global Running Day Celebration

Life Time Boulder 3 Jun 2026

14th Annual Kyle MacIntosh Memorial 5K

Franklin Field At the University of Colorado Boulder 21 Jun 2026

BRR Summer All-Comers Track & Field Meets

Potts Field 11 Jun 2026

Boulder Bubbleicious Bubble Run

Boulder, Colorado, USA 11 Jul 2026

Grit2Greatness Endurance Training Camp 2026 - Boulder, CO

Boulder Reservoir 25 Jun 2026

La Sportiva Green Mountain Challenge: Prize Giving Party

La Sportiva Retail Store 18 Jun 2026

Just One More Mile Virtual Race 2026 | Global Running Day Virtual

Boulder 3 Jun 2026

Plant Forward Boulder Potluck: Dine with a Dietician

NoBo Library - Boulder Public Library District 21 Jun 2026

Peony Virtual Race | 1M 5K 10K 13.1 26.2 | Language of Flowers Collection

Boulder 30 May 2026

Lavender Virtual Race 1M 5K 10K 13.1 26.2 | Language of Flowers Collection

Boulder 27 Jun 2026

Memorial Day 1M 5K 10K 13.1 26.2

Boulder 25 May 2026

Day of the Dog Virtual Race 1M 5K 10K 13.1 26.2

Boulder 22 Aug 2026

2026 Born to Be a Princess 1M 5K 10K 13.1 26.2 - Now Only $16!

Boulder 1 Nov 2026

Be Kind to Your Mind 1M 5K 10K 13.1 26.2

Boulder 2 May 2026

Face Your Giants Virtual Race 2026 | Christian Virtual Run

Boulder 6 Jun 2026

Cat Day Virtual Race 1M 5K 10K 13.1 26.2

Boulder 9 Aug 2026

Unhinged and Feral 1M 5K 10K 13.1 26.2 - Now Only $18!

Boulder 3 Oct 2026

Mother's Day 1M 5K 10K 13.1 26.2

Boulder 10 May 2026

2026 Race to Read 1M 5K 10K 13.1 26.2

Boulder 6 Mar 2026

May the 4th Be With You - 4 Mile Virtual Race

Boulder 4 May 2026