" Every bit of water falling on all of France, channeled into one drainpipe—that’s similar to what goes into the Columbia, or at least a shallow part of it. The river’s source is a glacial drip 2,619 feet above sea level in the foothills of the Canadian Purcells; by its midway point in a high desert, the Columbia has a depth several hundred feet below the ocean plane. "

― Timothy Egan , The Good Rain: Across Time & Terrain in the Pacific Northwest