Boulder Sunset Run

The Boulder Sunset Run is a scenic endurance event held at Boulder Reservoir in Boulder, Colorado. Featuring both 5K and 10K distances, the courses are flat, fast, and out-and-back, with runners crossing the Boulder Reservoir dam. The 5K offers two fueling stations near mile markers, while the 10K provides six, helping participants prepare for a slight downhill sprint to the finish.

The event promotes sustainability as a zero-waste race and enforces rules such as no strollers, headphones, dogs, or glass bottles on the course. It is part of BBSC’s summer endurance festival, attracting runners to enjoy a beautiful and competitive race experience. Visit the organization's website for the most recent information.