Common meanings include "west of the Appalachian Mountains", "west of the Mississippi", "west of the Missouri", "west of the Great Plains" (i.e. the Rockies and westward) and "west of the 100 degree west line of longitude".
Of course, everyone knows that the real west begins where the pick up trucks all have dogs in the back...
Picture - a typical western landscape (24KB)
State and Region Names
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Places & useful connections
Before you set out
Confirm current access, opening arrangements, reservations and the suitability of your planned roads and walks. Photographs may show earlier conditions.