Cascade Airport (ICS)

Cascade Airport, identified by the private FAA code U70 and historically associated with the IATA code ICS, is a premier general aviation facility and a critical backcountry flying hub serving the town of Cascade and the West Mountain region of Idaho. Located approximately two miles southeast of the city center along State Highway 55, the airport stands as an indispensable transport link for central Idaho's remote wilderness. It is uniquely recognized for hosting the last remaining airmail route in the Lower 48 States, with specialized aircraft providing weekly deliveries to isolated backcountry settlements. The airport features a robust physical infrastructure tailored for mountain operations, anchored by a primary 4,300-foot asphalt runway (12/30) situated at an elevation of 4,744 feet. While the facility lacks a traditional commercial passenger terminal with retail or dining, it offers a well-appointed operations base that provides essential services for private and charter pilots. Technical infrastructure includes pilot-activated lighting, computerized weather reporting, and expansive aircraft tie-down areas. The airfield is supported by on-site operators such as Arnold Aviation, which provides Jet-A and 100LL fueling, maintenance, and specialized mountain flight instruction. Flight operations at Cascade are dense and varied, with over 60% of the activity involving air taxi services that transport outdoor enthusiasts, researchers, and essential supplies to the Idaho backcountry. The airport also serves as a critical strategic base for the U.S. Forest Service and Bureau of Land Management during the fire season, acting as a primary staging area for firefighting aircraft. While there are no scheduled commercial airline services at this location, the airfield is a bustling hub for private executive travel and recreational aviation. Ground transportation is well-supported with local shuttle services and a dedicated courtesy car for visiting pilots, providing efficient access to the nearby Lake Cascade and its surrounding resort amenities.