Boulder Running Events

Tri Boulder Sprint, Olympic & Long Course

Boulder Reservoir 18 Jul 2026

Boulder Peak Triathlon, Duathlon, & Aquabike

Boulder Reservoir 12 Jul 2026

2026 Boulder Polar Plunge presented by Spectrum

Boulder Reservoir 4 Apr 2026

Harvest Moon Long Course Triathlon

Boulder Reservoir 31 May 2026

Boulder Rez Half Marathon

Boulder Reservoir 11 Apr 2026

Emerge 5K 2026

Boulder Reservoir 3 May 2026

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

Boulder Reservoir 6 Jun 2026

2026 Dash & Dine 5k Run Series

5565 Reservoir Rd, Boulder, CO, United States, Colorado 80301 28 Apr 2026

Boulder Sunrise Triathlon

Boulder Reservoir 28 Jun 2026

Boulder Rez Marathon

Boulder Reservoir 15 Aug 2026

Dirt Circus Boulder

Runners Roost (Boulder) 8 Aug 2026

Avery Spring 5k | Avery Brewing | 2026 CO Brewery Running Series

Avery Brewing Company 26 Apr 2026

Season Kickoff Party - Runners Roost Boulder

Runners Roost (Boulder) 8 Apr 2026

Boulder Bubbleicious Bubble Run

Boulder, Colorado, USA 11 Jul 2026

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

Wild Provisions by 4 Noses Brewing Company 27 Jun 2026

CU Diabetes Link 5K

Visual Arts Complex, Department of Art & Art History 12 Apr 2026

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

Boulder 2 May 2026

2026 He is Risen 1M 5K 10K 13.1 26.2- Benefitting Easter Seals

Boulder 5 Apr 2026

The 27th Mile with Dimity McDowell-Author Reading & FAQ

Performance & Recovery Labs/PR Labs 15 Apr 2026

Blood, Sweat & Spikes at In Motion Running

In Motion Running 6 May 2026

Earth Day 5K Virtual Race 2026

Boulder 19 Apr 2026

Like the Wind USA launch party

otto + co 2 Apr 2026

Race Through Alaska 1M 5K 10K 13.1 26.2 Virtual Race

Boulder 18 Apr 2026

2026 First Responders 1M 5K 10K 13.1 26.2

Boulder 28 Mar 2026

Memorial Day 1M 5K 10K 13.1 26.2

Boulder 25 May 2026

Race Through Alabama 1M 5K 10K 13.1 26.2 Virtual Race

Boulder 11 Apr 2026

Pi Day 5K Virtual Race 2026 – 3.14 Miles & Wooden Medal

Boulder 14 Mar 2026

Luck of the Irish 5K

Boulder 17 Mar 2026

2026 The Truth is Out There 1M, 5K, 10K, 13.1, 26.2

Boulder 20 Mar 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

We Lost Our Cents 1 Mile Virtual Race 2026 | Finisher Medal & Charity Run

Boulder 11 Apr 2026

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

Boulder 4 May 2026