Glaciers had a hand in shaping nearly everything in Washington. A finger of ice reaching down from Canada blocked rivers and streams on the westside of the rockies from draining into the Pacific. When the water got deep enough, it lifted the ice finger up and rushed westward. The water created the rolling Palouse hills the same way waves create ripples at the beach. Further north, the torrent gouged huge canyons and coulees like the one above – Potholes Coulee. In this photo, the White Glacier’s mass digs into Mount Olympus.