1966 Map of Humphreys Peak

Lower elevations reveal the functional infrastructure of the mid-1960s, from the Michelbach Ranch near Hart Prairie to the extensive pipeline and jeep trail networks. Local water sources like Bismarck Lake, Schultz Tank, and numerous springs such as Philomena Spring and Beard Spring highlight the critical role of water management in this arid mountain environment. The drainage of Rio de Flag and the geological presence of Cinder Pits and a Gravel Pit further define the land use patterns during this era of forest management.