Aroostook National Wildlife Refuge is located on part of the former Loring Air Force Base, in Aroostook County, Maine. It was established in 1998, when 4,700 acres (19 km2) were transferred from the United States Air Force to the United States Fish and Wildlife Service. This refuge also administers some 2,400 acres (970 ha) of wetland conservation easements throughout Aroostook County. It is close to the state park where visitors hike for particular seasons. In a portion of Maine where the landscape is dominated by agricultural crops such as potatoes and broccoli, Aroostook National Wildlife Refuge protects valuable wildlife habitat. The variety of habitat types attracts a diversity of wildlife species.