Things to do nearUnion Reservoir

Union Reservoir has served the Longmont community for generations, originally built as an agricultural water storage facility and gradually transformed into one of the area's most popular warm-weather destinations. The reservoir sits within a city-managed open space that has been thoughtfully developed to welcome swimmers, paddlers, anglers, and picnickers without sacrificing its natural character.

The swim beach is the heart of summer activity here, with lifeguards on duty during designated hours and a roped-off area that makes it family-friendly. Beyond swimming, the open water is well suited to paddleboarding and kayaking, and the afternoon winds that roll down from the Rockies make it a favorite among windsurfers and kitesurfers as well.

Fishing is another draw, with warmwater species including largemouth bass and bluegill found throughout the reservoir. A paved path circles much of the shoreline, offering a pleasant loop for walkers and joggers with unobstructed mountain views. Nearby, Carter Lake provides another option for a full day of outdoor exploration in Boulder County.

Union Reservoir earns its place as a local favorite by offering genuine outdoor recreation close to home, with enough space and variety to keep every visit feeling fresh.