1958 Map of Shadow Mountain

About this map

Grand Lake serves as the northern anchor of this high-altitude landscape, where the waters of the North Fork Colorado River begin their journey south. The map documents a transformative era for the region's hydrology, featuring the newly established Shadow Mountain Lake and the massive Lake Granby reservoir system. A critical piece of engineering, the Alva B Adams Tunnel, is shown near the west portal, signifying the mid-century efforts to divert water across the Continental Divide.