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

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

 Sat, 06 Jun at 07:15 am Boulder Reservoir

Boulder Sunrise Triathlon

 Sun, 28 Jun at 07:15 am Boulder Reservoir

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

Dirt Circus Boulder

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

Boulder Rez Marathon

 Sat, 15 Aug at 07:15 am Boulder Reservoir

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

BRR Summer All-Comers Track & Field Meets

 Thu, 11 Jun at 06:00 pm Potts Field

The Mile High Mile - Memorial Day Weekend

 Sat, 23 May at 01:00 pm Boulder High School Recht Field

Boulder Bubbleicious Bubble Run

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

Grit2Greatness Endurance Training Camp 2026 - Boulder, CO

 Thu, 25 Jun at 08:00 am Boulder Reservoir Free

La Sportiva Green Mountain Challenge: Prize Giving Party

 Thu, 18 Jun at 06:30 pm La Sportiva Retail Store Free

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

 Sat, 30 May at 01:00 pm Boulder USD 4 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

Bee Happy Race 2026 | Fun Virtual 5K, 10K, Half Marathon

 Sat, 16 May at 01:00 pm Boulder USD 4 to 42

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

 Sat, 27 Jun 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

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

 Sun, 01 Nov at 01:00 pm Boulder USD 0 to 42

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

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

BolderBoulder 10K

 Mon, 25 May at 07:00 am 30th St& Walnut St Boulder CO , 80303

Davidson Mesa on Canvas (Open Space Plein Air Series)

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

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