Run Boulderthon: The Boulder Marathon

SEP
26
2027
A multi-distance running event in downtown Boulder with marathon, half, 10K, 5K and a Kids Run plus lululemon apparel and a large downtown race expo.
Sun 26 Sep 2027
26 miles 13 miles 10 kilometers 5 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

Boulderthon powered by lululemon: The Boulder Marathon

Boulderthon powered by lululemon is a multi-distance running event on Sun, Sep 26, 2027 in downtown Boulder, Colorado at 1303 Pearl St. The event is organized by Boulderthon and features several race options held around the Pearl Street Mall and nearby streets.

Available distances:

  • Marathon 26.2 mi
  • Half Marathon 13.1 mi
  • 10K Presented by Cheribundi 10 km
  • Heart to Heart 5K Presented by Boulder Community Health 5 km
  • Kids Run

Participants receive a choice of a lululemon Metal Vent Tech or Swiftly Tech long sleeve, a limited edition finisher medal, and Laurel Chip Timing for near real time tracking. Race services include water and hydration stations, pre-race and on-course fueling, gear check, medical support, on-course cheer stations, event photography, and prizes for top finishers and age group awards. Marathon and half marathon entries include a complimentary Athletic Brewing drink or similar beverage. The event is USATF sanctioned and is a Boston Marathon qualifying race.

Logistics noted by the organizer include a Start Village on the Pearl Street Mall, a Start Line at 18th and Pearl, a Finish at 15th and Spruce, free parking at several downtown garages, and an onsite Race Expo with more than 70 partners and over 40,000 total attendees. Visit the organization's website for the most recent information.

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