Twin Bridges Airport is a state-owned public-use airstrip located 22 miles (35 km) northeast of the central business district of Ketchum, a city in Custer County, Idaho, United States. Facilities and aircraft Twin Bridges Airport covers an area of which contains one runway (3/21) with a turf surface measuring 4,450 x 100 ft (1,356 x 30 m). For the 12-month period ending August 17, 2005, the airport had 800 aircraft operations: 75% general aviation and 25% air taxi. The airport is located close to the Big Lost River in a narrow valley. Approaches to runway 21 must be flown off the extended runway centerline due to a mountain. References External links Twin Bridges Airport at Idaho Transportation Department Airports in Idaho Buildings and structures in Custer County, Idaho Transportation in Custer County, Idaho