Running Events in Boulder

Check out happening running events all around Boulder, CO

Tri Boulder Sprint, Olympic & Long Course

 Sat, 18 Jul at 07:15 am Boulder Reservoir

Boulder Peak Triathlon, Duathlon, & Aquabike

 Sun, 12 Jul at 07:15 am Boulder Reservoir

Harvest Moon Long Course Triathlon

 Sun, 31 May at 07:15 am Boulder Reservoir

Emerge 5K 2026

 Sun, 03 May at 08:00 am Boulder Reservoir

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

 Sat, 06 Jun at 07:15 am Boulder Reservoir

2026 Dash & Dine 5k Run Series

 Tue, 28 Apr at 06:30 pm 5565 Reservoir Rd, Boulder, CO, United States, Colorado 80301

Boulder Sunrise Triathlon

 Sun, 28 Jun at 07:15 am Boulder Reservoir

Boulder Rez Marathon

 Sat, 15 Aug at 07:15 am Boulder Reservoir

Dirt Circus Boulder

 Sat, 08 Aug at 08:00 am Runners Roost (Boulder)

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

 Sun, 26 Apr at 10:00 am Avery Brewing Company USD 0 to 65

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

 Sun, 18 Oct at 10:00 am Avery Brewing Company USD 0 to 65

Boulder Race Day Shuttle – Denver to Boulder

 Mon, 25 May at 05:00 am 3005 Arapahoe Ave USD 29

Boulder Bubbleicious Bubble Run

 Sat, 11 Jul at 12:00 pm Boulder, Colorado, USA

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

 Sat, 27 Jun at 10:00 am Wild Provisions by 4 Noses Brewing Company USD 0 to 65

Neptune x Salomon Trash Dash

 Thu, 23 Apr at 05:30 pm Neptune Mountaineering Free

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

 Sat, 02 May at 01:00 pm Boulder USD 4 to 42

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

 Sun, 05 Apr at 01:00 pm Boulder USD 7 to 42

Blood, Sweat & Spikes at In Motion Running

 Wed, 06 May at 06:00 pm In Motion Running

Earth Day 5K Virtual Race 2026

 Sun, 19 Apr at 01:00 pm Boulder USD 15 to 42

Race Through Colorado Virtual Race | 5K, 10K, Half Marathon | Run Anywhere

 Sat, 09 May at 01:00 pm Boulder USD 5 to 42

Race Through Hawaii Virtual Race | 5K, 10K, Marathon | Run Anywhere

 Sat, 16 May at 01:00 pm Boulder USD 5 to 42

Memorial Day 1M 5K 10K 13.1 26.2

 Mon, 25 May at 01:00 pm Boulder USD 4 to 42

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

 Sat, 22 Aug at 01:00 pm Boulder USD 4 to 42

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

 Sat, 25 Apr at 01:00 pm Boulder USD 5 to 42

Davidson Mesa on Canvas (Open Space Plein Air Series)

 Sun, 19 Jul at 07:30 am Davidson Mesa Trailhead Free

Race Through Georgia Virtual Race | 5K, 10K, Half Marathon & More | Run

 Sat, 02 May at 01:00 pm Boulder USD 5 to 42

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

 Sun, 09 Aug at 01:00 pm Boulder USD 4 to 42

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

 Sat, 03 Oct at 01:00 pm Boulder USD 0 to 42

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

 Sun, 10 May at 01:00 pm Boulder USD 4 to 42

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

 Fri, 06 Mar at 01:00 pm Boulder USD 5 to 42

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

 Mon, 04 May at 01:00 pm Boulder USD 5 to 42