Boulder Sunset Triathlon

AUG

29

2026

A multi-format triathlon at Boulder Reservoir on August 29, 2026 featuring a sunrise swim, fast bike and smooth run with the Flatirons in view. Sprint, Olympic, aquabike, duathlon and relay options are available.

Sat 29 Aug 2026

Boulder Reservoir, Colorado

Website

Aquabike Duathlon Olympic Individual Sprint Individual

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Boulder Sunset Triathlon 2026

The Boulder Sunset Triathlon is scheduled for August 29, 2026 at Boulder Reservoir in Boulder, Colorado (5565 51st St, 80301). The event is organized by BBSC Endurance Sports, a promoter of multi-sport endurance races in Nevada, Utah and Colorado. The organizer notes that participant safety is a top priority.

The race format combines a swim, a bike section and a run, with course features described as a sunrise swim, a fast bike course and a smooth run course framed by the Flatirons. Multiple entry options are listed for the event, including Sprint and Olympic individual races, duathlon and aquabike formats, and relay team options. The event page identifies categories for elite, age group and beginner athletes and indicates the timing near the end of the summer racing season in Boulder. Visit the organization's website for the most recent information.

Aquabike

Duathlon

Olympic Individual

Sprint Individual