1957 Map of Bottle Pass

About this map

The Arapaho National Forest defines this high-altitude landscape of the Front Range as it appeared during the 1950s. The terrain is marked by a complex network of hydrological engineering and forestry research, notably at the Fraser Experimental Sta. Water management is a primary theme of this map, shown through features like the St Louis Aqueduct and the Big Six Ditch, which divert alpine flow across the continental divide. Natural landmarks such as Ptarmigan Peak, Bottle Pass, and the quiet Lake Evelyn anchor the geography. Several family-named or distance-based summits, including Ninemile Mtn and Sheep Mountain, provide clear orientation for researchers studying the historical boundaries and recreational trails of this mountain corridor.