Lake County Airport (IATA: LXV, ICAO: KLXV, FAA LID: LXV), also known as Leadville Airport, is a county-owned public-use airport located two statute miles (3 km) southwest of the central business district of Leadville, a city in Lake County, Colorado, United States. At 9,927 ft (3,026 m) above mean sea level the airport claims the distinction of being North America’s highest. Pilots receive a free certificate commemorating their landing upon a successful landing. Aircraft performance deteriorates rapidly with altitude, so many organizations use the Leadville Airport as a base for high altitude performance testing. Lake County Airport covers an area of 605 acres (245 ha) which contains one runway (16/34) measuring 6,400 x 75 ft (1,951 x 23 m), plus a helipad measuring 150 x 100 ft (46 x 30 m).