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1966 Map of Elwood Pass

Name: 1966 Topographic Map of Elwood Pass
Creator: U.S. Geological Survey
Published: 1968
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1968

About this map

The Continental Divide winds through this high-altitude landscape of the mid-1960s, marking the watershed between the East Fork San Juan River and the headwaters of the West Fork Rio Grande. Human activity in these mountains is represented by remote outposts and historic extraction sites, such as the Black Diamond Mine and the McCormick Cabin. High mountain passes including Elwood Pass, Silver Pass, and Bonito Pass connect the drainage basins, serving as critical transit points for the Continental Divide (Pack) Trail and various unnamed Jeep Trails.

Resource management and high-country grazing are evident through the Elwood Guard Sta and the long Stock Driveway traversing the eastern slopes near Handkerchief Mesa. The terrain is characterized by steep glacial features and alpine water bodies like Crater Lake and Poage Lake. This survey illustrates the intricate boundary lines where Mineral, Rio Grande, Archuleta, and Conejos counties converge along the ridge lines of the Rio Grande and San Juan National Forests.