Lake Chelan invites superlatives. It is extraordinarily narrow: it extends over 50 miles into the heart of the Cascade Range, but averages only a bit more than a mile wide. It is the deepest lake in Washington (and the third-deepest in the United States) at 1,486 feet, behind only Crater Lake in Oregon (1,949 feet) and Lake Tahoe between California and Nevada (1,645 feet). It sits in a glacially carved valley, oversteepened by the glaciation, such that not only are the slopes extremely steep but the lake floor itself was…
