of eastern Washington were carved by enormous catastrophic floods escaping glacial Lake Missoula in Montana about 10 to 12,000 years ago, plucking and scouring the basalt bedrock creating numerous lake basins and wetlands. Fish Lake, seen below this beautifully calm morning, is such a lake and is sustained through the hot, dry summers by groundwater recharge.
Fish Lake, Spokane County, Washington. (Click on image to enlarge.)