Lake Clark National Park and Preserve's 4 million acres include the north end of the Alaska Peninsula in south-central Alaska. The park straddles the Chigmit Mountains, bridging the Aleutian Range to the southwest and the Alaska Range to the north. Mountainous terrain rises from the coastline of western Cook Inlet, framed by rugged peaks and spires, glaciers, and snow-clad volcanoes. West of the mountains lies a region characterized by braided glacial rivers, cascading streams, waterfalls, turquoise lakes, boreal forest and tundra. Unique environmental features and ecosystems support this untamed wilderness.