I took this picture where some of the largest floods took place. They carved steep-walled canyons, sculpted immense waterfalls, and left behind landscapes found nowhere else on earth.
Throughout the last Ice Age, many high-powered floods filled this landscape with water, some higher than others. The largest known flood was approximately 900 feet higher than the pre-dam Columbia River - 840 feet above the modern river. Standing here, this flood would have been approximately 550 feet above my head.
During the last Ice Age, a lobe of ice at least a half-mile high blocked the Clark Fork River in Idaho, creating an enormous lake, glacial Lake Missoula. This ice dam failed - over and over - sending billions of tons of water rampaging across the land.
Thundering torrents of water, mud and icebergs raced through the Columbia River corridor, stripping away millions of tons of soil and rock, and shaping the unique scenery of the Gorge. The floodwaters raged all the way to the mouth of the river, eventually pouring into the Pacific Ocean. (It pays reading the information plaques in State Parks.) #landscape #road #nature #washington #pnwonderland #pnw #columbiariver