Long Lake National Wildlife Refuge, located in south-central North Dakota, was established in 1932 as a migratory bird refuge by President Herbert Hoover. The 22,300-acre (90 km²) refuge consists of a 15,000-acre (61 km²) saline basin that is 18 miles (29 km) long and is appropriately named "Long Lake." Long Lake is relatively shallow; it is normally 3–4 feet (0.91–1.22 m) deep.