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2015 Map of Ambrose Valley

Name: 2015 Topographic Map of Ambrose Valley
Creator: U.S. Geological Survey
Published: 2015
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2015

About this map

Dan Ryan Place and the high desert valleys of northern California define this mid-2010s survey. The landscape is characterized by a network of drainage systems and ridges, notably the Ambrose Valley and Ash Valley, which intersect near the border of Modoc and Lassen Counties. The terrain is marked by seasonal water sources such as Big Pine Spring, Deer Spring, and Slate Spring, which were vital for cattle ranching and early settlement in this arid region.

Significant landmarks like Hunters Ridge and Knox Flat indicate the land-use patterns of the area, where name-based locations like Hunsinger Draw and Reid Draw suggest historical family holdings or local lore. The presence of Butte Rd provides a trace of the rural infrastructure connecting these remote canyons and flats, including Sager Canyon and the expansive Round Valley in the northwest. This map serves as a precise record of the topographic and hydrologic features of the Warner Mountains foothills.