Guernsey State Park in Wyoming is a 6,000 acre state park surrounding Guernsey Reservoir that provides a variety of water recreation, day use and overnight camping opportunities. The rugged and scenic landscape of the park offers scenic vistas and overlooks, hiking and biking trails, rock climbing and wildlife viewing opportunities. In addition to the unlimited number of outdoor recreation activities that can be found at Guernsey, the park is also a National Historic Landmark.
Guernsey State Park provides the finest examples of Civilian Conservation Corps (CCC) work in the Rocky Mountain area. Built by the CCC, the Guernsey Museum, the Castle and Brimmer Point are available to explore. The Castle, with its giant fireplace and winding steps, leads to an observation area for a spectacular view of the park.