1963 Map of Cascade Pass

About this map

Cascade Pass serves as the central hub of this high-elevation survey, marking the dramatic divide between the Skagit and Chelan County lines. The landscape is defined by massive ice fields and steep drainages, including the Boston Glacier, Sahale Glacier, and Middle Cascade Glacier. Evidence of high-altitude prospecting is captured at the Midas Diamond Mine near Soldier Boy Creek, along with an additional unnamed Mine located north of the Stehekin River headwaters. The map details the intricate network of peaks and ridges that define the crest, such as Mount Formidable, Sahale Mtn, and the sharp profile of Ripsaw Ridge. Water features range from the larger Trapper Lake and Doubtful Lake to smaller alpine basins like Kool-Aid Lake and the Yang Yang Lakes. This record captures the region shortly after the 1958 aerial surveys, documenting a complex glacial environment before several decades of modern recession.