From the river valleys of interior British Columbia south to the hills of northern Oregon and east to the continental divide in western Montana, hundreds of cliffs and boulders display carved and painted designs created by ancient artists who inhabited this area, the Columbia Plateau, as long as seven thousand years ago. Expressing a vital social and spiritual dimension in the lives of these hunter-gathers, rock art captivates us with its evocative power and mystery. At once an irreplaceable yet fragile cultural resource, it documents Native histories, customs, and visions through thousands of years.