Road running

Boulder Rez Marathon

📅 August 15, 2027 (estimated date)📍 Boulder · United States

⚠️ 2027 edition: provisional information

The date is estimated from the 2026 edition (August 15, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.

Available distances

26.2 mi18.6 mi13.1 mi6.2 mi

About

The Boulder Rez Marathon in Boulder offers a marathon (26.2 miles / 42.2 km) and a marathon relay at 7:15 a.m., a 3/4 marathon at 7:25 a.m., a half marathon (13.1 miles / 21.1 km) at 7:07 a.m. and a 10K at 7:40 a.m. on August 15, 2027.

The races are run mostly on dirt roads and trails along Boulder Reservoir, with sweeping views of the surroundings, and the event is USATF-sanctioned. Participants receive a T-shirt and a medal, and awards go to the top three men and women overall as well as to the age-group winners.

D-301

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Races nearby

Other upcoming races around Boulder.