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2021 Map of Larkspur Hills

Name: 2021 Topographic Map of Larkspur Hills
Creator: U.S. Geological Survey
Published: 2021
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2021

About this map

Surprise Valley defines the western edge of this Modoc County landscape, where the flat basin meets the rising slopes of the Larkspur Hills. This corner of California is characterized by its internal drainage systems, including the seasonal waters of Upper Lake and the smaller Big Mud Lake to the northeast. Human presence is marked by infrastructure centered on water management, most notably the Fee Reservoir and its associated Fee Reservoir Rd.

Drainage patterns here follow deep incisions such as Lieberman Canyon and Long Canyon, which channel seasonal runoff into the valley. Numerous natural water sources like Conlan Spring and Poison Springs are identified, providing critical points of interest for land use and local history. The map also traces the paths of Schamp Cr and several forks of First Creek as they descend from the hills toward the valley floor.