Boulder Reservoir

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. Popular recreation activities at the reservoir include boating, swimming, sun bathing, water skiing, fishing, picnicking, walking, running, cycling and wildlife viewing.

• View current projects and completed plans for the Reservoir

Colorado Parks and Wildlife has confirmed the presence of Eurasian watermilfoil (EWM), an invasive plant, in the Boulder Reservoir during a semi-annual invasive species monitoring visit. If it becomes established, EWM grows quickly, forms thick mats and disrupts aquatic ecosystems.

The invasive plant is not harmful to humans.

With this discovery, the city will work closely with Colorado Parks and Wildlife this fall to determine whether the plant has been established in the Reservoir.

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To keep in touch with our community members and provide times to chat about everything Reservoir, we have started a monthly “Open Door Hours” event. The event happens the first Monday of the month at the Main Building from 5:30-6:30 p.m. We’d love to see you there!

Sign up for email updates to get a notice about future Open Door Hours events.

• Upcoming Boulder Reservoir Open Doors Events schedule
• Boulder Reservoir Feedback Form