Americans have long regarded the West as the last frontier. Yet California has a history of European settlement older than that of most midwestern states. Spanish priests founded missions along the California coast a few years before the outbreak of the American Revolution. In the 19th century, California and Oregon entered the Union ahead of many states to the east.
The West is a region of scenic beauty on a grand scale. All of its states are partly mountainous, and the ranges are the sources of startling contrasts. To the west of the peaks, winds from the Pacific Ocean carry enough moisture to keep the land well-watered. To the east, however, the land is very dry. Parts of western Washington State, for example, receive 20 times the amount of rain that falls on the eastern side of the state's Cascade Range.