Local News and Events in Boulder, CO
Reservoir Swim Beach Opens
Friday, May 22, 2026 · Boulder, CO
The Boulder Reservoir swim area is scheduled to reopen for the season on Friday, May 22 at 10 a.m. With Memorial Day weekend just ahead, this is one of the clearest signs that summer recreation is arriving in earnest. Residents heading out should remember that swimming is only allowed in the designated lifeguarded area during posted hours.