Boulder Sunset Run
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Boulder Sunset 10K & 5K Run
The Boulder Sunset 10K & 5K Run takes place at Boulder Reservoir in Boulder, Colorado on August 29, 2026. The event is organized by BBSC and features two road race distances on the reservoir course.
Courses
Both courses are out-and-back routes that cross the Boulder Reservoir dam and are described as flat. The course layout includes multiple opportunities for fueling near mile markers and a slight downhill section near the finish.
- 5K - out-and-back across the Boulder Reservoir dam; two fueling opportunities.
- 10K - out-and-back across the Boulder Reservoir dam; six fueling opportunities.
Logistics and rules
Packet pick up is available on the days before the race at local retailers and on race morning at the Boulder Reservoir parking lot near the timing trailer and finish line; locations are provided by the organizer. The event is designated as a zero waste event. Course rules include no strollers, no headphones or earbuds, no dogs at the Boulder Reservoir, and no glass bottles at the venue.
Registration and pricing
Registration fees vary by registration period. Prices listed by the organizer are: Visit the organization's website for the most recent information.
- 5K: $40 (Dec 9-16), $50 (through Dec 31), $60 (through Aug 29)
- 10K: $50 (Dec 9-16), $60 (through Dec 31), $70 (through Aug 29)
