1953 Map of Cony Mountain

About this map

McMahon Park sits amidst a high-elevation drainage system in Fremont County, captured during the mid-century as part of a larger federal study for the Missouri River Basin. The landscape is defined by the headwaters of the Middle Fork Popo Agie River, where water moves through complex terrain toward the valleys below. Evidence of the region’s hydrological significance is found in the network of glacial remnants and streams, including Petes Lake and the upper reaches of Fairfield Creek. This 1953 field-checked survey provides a clear view of the wilderness before later development or environmental shifts, focusing on the natural water systems like South Fork Squaw Cr that have long shaped the Wyoming interior.