Standley Lake Regional Park is a 2,321 acre park located in unincorporated Jefferson County. Standley Lake is a multi-use recreation and water-storage facility, and is the water supply for Westminster, Northglenn, and Thornton. It is used for recreation, drinking water and irrigation. Standley Lake offers a number of activities including tipi and paddle craft rentals, camping, boating (by permit only), fishing, hiking, nature programs and wildlife viewing.