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1917 Map of Diamond Lake

Name: 1917 Topographic Map of Diamond Lake
Creator: U.S. Geological Survey
Published: 1948
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1948

About this map

Diamond Lake and the surrounding high cascades of the Umpqua National Forest dominate this topographical study from the mid-1910s. The landscape is defined by its volcanic peaks and glacial basins, including the iconic spire of Mt Thielsen and the broad slopes of Mt Bailey. These peaks serve as the divide between several major drainage systems, with the headwaters of the North Fork Umpqua River and the Middle Fork Willamette River carving deep valleys through the timbered terrain.

Early administrative presence in the wilderness is marked by the Rigdon Ranger Sta and Fish Creek Ranger Station, alongside seasonal outposts like Old Man Camp. The southern edge of the survey transitions into the newly established Crater Lake National Park, showing the northern volcanic features such as Desert Cone and Oasis Butte. Notable early transportation routes like the Bradley Trail and the Road Military trace the high ridges and lake margins, illustrating the difficult access to this interior wilderness before modern infrastructure.