Located in the Lahontan Valley, Fallonis the county seat of Churchill County, Nevada, in the western part of the state. Fallon and Churchill County are mostly agricultural areas. Although the area is arid, approximately 50,000 acres (200 km2) of its pastureland are irrigated with water from the Truckee–Carson Irrigation District. The principal crop grown is alfalfa for livestock feed. The largest single employer in Fallon and Churchill County is the important Naval Air Station Fallon, a training airfield that has been the home of the U.S. Navy's Naval Strike and Air Warfare Center including the TOPGUN training program since 1996, when it was moved to Fallon from Naval Air Station Miramar.