Aspen-Pitkin County/Sardy Field is a small, single runway airport located in the Roaring Fork Valley just 2.5 miles northwest of the resort town of Aspen, Colorado. It has associated Class Delta airspace and is surrounded by rapidly rising terrain from the northeast through the southwest. ASE is a high altitude airport with a field elevation of almost 8000’. A high density altitude will affect aircraft performance all year round but especially in the summer.