Indian Mountain LRRS Airport (IATA: UTO, ICAO: PAIM) is a small general aviation and military-use airport located near Utopia Creek in the remote interior of Alaska, United States. It is associated with the Indian Mountain Long Range Radar Site (LRRS), one of several unmanned radar stations operated as part of the United States Air Force's distant early warning and air sovereignty mission in Alaska. The airport sits in a sparsely populated region of interior Alaska and serves primarily as an access point for military and government personnel maintaining the radar installation. Commercial air service is extremely limited, and the facility is not a conventional passenger airport. Access to the area is almost entirely by air due to the lack of road infrastructure.