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2011 Map of Peterson Ridge

Name: 2011 Topographic Map of Peterson Ridge
Creator: U.S. Geological Survey
Published: 2011
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2011

About this map

Peterson Ridge and Government Mountain dominate this corner of Umatilla County, where a complex network of canyons and drainage systems defines the high-altitude landscape. The map reveals the intricate headwaters of the North Fork Walla Walla River in the south, while the northern terrain is carved by the three branches of Cottonwood Creek and the tributary systems of Reser Creek and Russell Creek.

Remote mountain access is recorded through high-elevation tracks like Mormon Grade and Pikes Peak Rd, which snake through the timbered divides between Saddle Mountain and Pine Ridge. The cartography illustrates a transition from the deep incision of Little Meadow Canyon to the more gradual slopes of Foster RD, capturing the area as it appeared in the early 21st century for land management and environmental study.