The Boulder Reservoir is a 700-acre, multi-use recreation and water-storage facility, owned and managed by the City of Boulder and operated as a water supply by the Northern Colorado Water Conservancy District. It is used for recreation, drinking water and irrigation.

The Boulder Reservoir offers a cool, refreshing break with paddle boarding, boating, swimming and picnicking.

Boulder Reservoir is located in the northern part of Boulder, Colorado. It stores water for the Northern Colorado Water Conservancy District — also called Northern Water — and for the City of Boulder.

Hours are subject to change. Hours below are 7 days/week. See the Special Event Schedule for scheduled closures due to events. Swimming hours and information. Reservoir Hours 2025

Open water swimming at the Boulder Reservoir is available through Boulder Aquatic Masters (BAM) and Stroke and Stride. Otherwise, per city code, no swimming is allowed outside the designated lifeguarded swim area.

Boulder Reservoir is a 700-acre, multi-use recreation and water-storage facility, just north of downtown Boulder, owned and managed by the City of Boulder and operated as a water supply by the Northern Colorado Water Conservancy District.

Dec 15, 2024 · Boulder Reservoir, established in 1955 as a water storage facility, has grown into one of the city’s most iconic outdoor destinations. Surrounded by the breathtaking Rocky Mountain backdrop, it offers a wide array of activities for visitors year-round.

Sep 12, 2023 · Explore Boulder Reservoir, a haven for outdoor enthusiasts. Dive into water sports, enjoy serene views, or participate in events.

Sep 14, 2016 · Boulder Reservoir, a 700-acre lake northeast of Boulder, provides water for irrigation and the City of Boulder. The reservoir lies in Boulder Reservoir Regional Park, a popular city parkland.

Completed in 1955, the 700-acre Boulder Reservoir is a year-round playground for outdoor recreation in Northern Boulder. It also serves as a water storage facility for the Northern Colorado Water Conservancy District and the City of Boulder.