The California coast is about 2,900 km long, which includes the San Francisco Bay and the offshore islands. Some 70% of the coastline is rocky or has cliffs, although pocket and fringing beaches are found commonly below the cliffs.

The Pacific coast of Oregon extends for nearly 700 km from the Washington border on the Columbia River in the north, to the border with California in the south.

The coastline of the state of Washington is 4,296 km long and consists of three segments: the eastern coast and islands from the Canadian border in the north down to the straits and islands of Puget Sound in the south, the northern coast of the Olympic Peninsula along the Strait of Juan de Fuca, and the outer, western, coast facing the Pacific Ocean.

Alaska, which spans 20° of latitude and 50° of longitude, has a coastline about 10,686 km in length. 

The major geomorphological divisions of the United States, the Rocky Mountain ranges, the Great Plains and the Appalachian ranges, do not have a major influence on coastal features.