1967 Map of Platoro

About this map

The high-altitude mining and water infrastructure of the San Juan Mountains defines this 1967 survey. Summitville and the settlement of Platoro serve as the primary human anchors in a landscape dominated by the Rio Grande National Forest. The map documents critical extraction and transit history through features like the Mammoth Revenue Mine, Chandler Tunnel, and French Tunnel. The Continental Divide winds through the western half, intersected by the Continental Divide Trail and high passes such as Elwood Pass and Silver Pass. Water management is prominent at the Platoro Reservoir, where a Gatehouse controls the flow, and numerous high-alpine lakes like Lake Annella and Hilman Lake dot the basins. Evidence of early forest management and local shelter appears at the Elwood Guard Sta, McCormick Cabin, and Stunner Cabin.