Marathons in Boulder

Check out happening marathons events all around Boulder, CO

Boulder Sunrise Triathlon

 Sun Jun 23 2024 at 07:15 am Boulder Reservoir

12th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

 Sun Jun 23 2024 at 08:00 am Boulder, Colorado

Harvest Moon Long Course Triathlon

 Sat Sep 07 2024 at 07:15 am Boulder Reservoir

Tri Boulder Sprint, Olympic & Long Course

 Sat Jul 20 2024 at 07:15 am Boulder Reservoir

National Order of the Arrow Conference (NOAC)

 Mon Jul 29 2024 at 11:00 am University of Colorado Boulder

Boulder Peak Triathlon, Duathlon, & Aquabike

 Sun Jul 14 2024 at 07:15 am Boulder Reservoir

Boulder Pride Bar Crawl

 Sat Jun 29 2024 at 05:00 pm Boulder Free

Boulder Official Pride Bar Crawl

 Sat Jun 22 2024 at 04:00 pm Boulder Free

Boulderthon Half and Full Marathon Course Preview Run

 Sat Aug 24 2024 at 07:00 am Fleet Feet Boulder (Boulder Running Company) Free

W360- Walk Around Boulder- Saturday June 22nd

 Sat Jun 22 2024 at 07:00 am Four Mile Creek Trailhead

Boulder Oktoberfest Bar Crawl

 Sat Sep 28 2024 at 04:00 pm Boulder Free

Boulder Stroke & Stride Series

 Thu Jun 20 2024 at 06:00 pm Boulder Reservoir