The Mega Flood Route - The Washington Coast to Missoula Mt

If you are interested in the fascinating structural geology of eastern Washington and western Idaho as well as the scablands, there are two not-to-miss areas immediately west and east of them. The Okanogan Trench along US 97 north of Chelan and the Seven Devils Complex along US 395 south of Grangeville, ID are well-worth exploring too. They are the result of plate tectonics and represent "foreign" geologic terranes that were not originally part of the North American Plate.