Aspen/Pitkin County Airport, also known as Sardy Field, is a county-owned public-use airport located three nautical miles (6 km) northwest of the central business district of Aspen, in Pitkin County, Colorado, United States. Aspen/Pitkin Co. Airport/Sardy Field covers an area of 573 acres (232 ha) at an elevation of 7,820 feet above mean sea level. It has one asphalt paved runway designated 15/33 which measures 8,006 by 100 feet.

Aspen is a home rule municipality that is the county seat and the most populous municipality of Pitkin County, Colorado, United States. The city population was 7,004 at the 2020 United States Census. Aspen is in a remote area of the Rocky Mountains' Sawatch Range and Elk Mountains, along the Roaring Fork River at an elevation just below 8,000 feet (2,400 m) above sea level on the Western Slope, 11 miles (18 km) west of the Continental Divide. Aspen is now a part of the Glenwood Springs, CO Micropolitan Statistical Area.