Harriman State Park is a public recreation area located on the Harriman Wildlife Refuge in Fremont County, south of Island Park in eastern Idaho, United States. The state park is within the Henry's Fork Caldera in the Greater Yellowstone Ecosystem. It is home to an abundance of elk, moose, sandhill cranes, trumpeter swans, and the occasional black or grizzly bear. Two-thirds of the trumpeter swans that winter in the contiguous United States spend the season in Harriman State Park. History The park's acreage was owned by Union Pacific Railroad investors from 1902 to 1977, serving as a cattle ranch and private retreat for the Harriman and Guggenheim families. It was deeded to Idaho for free in 1977 by Roland and W. Averell Harriman, whose insistence that the state have a professional park managing service helped prompt the creation of the Idaho Department of Parks and Recreation in 1965. The park opened to the public in 1982. Support group Friends of Harriman State Park, Inc., a 501(c)(3) organization dedicated to community projects that directly benefit Harriman State Park of Idaho, was formed in 2010 after an announcement by the State of Idaho of the need to cut park funding completely and eventually dissolve the Idaho Department of Parks and Recreation into another state agency, a contingency that was not put in place. Activities and amenities Henry's Fork, a fly-fishing stream of note, winds through park meadows for eight miles. The park offers trails for hiking, biking, and horseback riding. In winter, roads and trails are groomed for cross-country skiing. See also List of Idaho state parks National Parks in Idaho References External links Harriman State Park Idaho Parks and Recreation Harriman State Park and Harriman Wildlife Refuge Boundaries Map Idaho Parks and Recreation Friends of Harriman State Park Protected areas of Fremont County, Idaho State parks of Idaho Protected areas established in 1977 Yellowstone hotspot