Tour descends with numerous switchbacks into the Columbia River Canyon. The jagged Chelan River Gorge which walls in the curving sides of the Chelan River, only four miles in length. This stream, which before hydroelectric and irrigation development was a river of considerable volume, is now little more than the spillway over the great natural moraine dam and the concrete dam constructed to raise the waters of Lake Chelan. There is no trace of vegetation in this rocky canyon except for a gnarled pine looking down from its perch on a high point.