Girdwood is a resort town within the southern extent of the Municipality of Anchorage in the U.S. state of Alaska. Located near the end of the Turnagain Arm of Cook Inlet, Girdwood lies in a valley in the southwestern Chugach Mountains, surrounded by seven glaciers feeding into a number of creeks, which either converge within the valley or empty directly into the arm. Girdwood is typically accessed by the Seward Highway (Milepost 90), with the main line of the Alaska Railroad paralleling the highway. By road distance, most of the community lies within 35 to 40 miles (56 to 64 km) of Downtown Anchorage. The 2019 American Community Survey estimates a population of 1,742 in the valley.