Lake Hood Seaplane Base (ICAO: PALH, FAA LID: LHD) is a state-owned seaplane base located 3 nautical miles (5.6 km) southwest of the central business district of Anchorage in the U.S. state of Alaska. The Lake Hood Strip (ICAO: PALH, FAA LID: LHD) is a gravel runway located adjacent to the seaplane base. The gravel strip airport's previous code of (FAA LID: Z41) has been decommissioned and combined with (ICAO: PALH, FAA LID: LHD) as another landing surface. Operating continuously and open to the public, Lake Hood is the world's busiest seaplane base, handling an average of 190 flights per day. It is located on Lakes Hood and Spenard (Niłkidal'iy in the indigenous Dena'ina language), next to Ted Stevens Anchorage International Airport three miles from downtown Anchorage. The base has an operating control tower, and during the winter months the frozen lake surface is maintained for ski-equipped airplanes.