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2020 Map of Coglan Buttes

Name: 2020 Topographic Map of Coglan Buttes
Creator: U.S. Geological Survey
Published: 2020
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2020

About this map

Upper Chewaucan Marsh dominates the basin floor in this high-desert portion of Lake County, where the Chewaucan River and a complex system of irrigation infrastructure define the landscape. Water management is the primary human imprint here, evidenced by a dense network of watercourses including the Outside Canal, Red House Ditch, and ZX-Brattain Ditch. These features point to a long-standing ranching and agricultural economy, with water redirected from the marsh and river to sustain the surrounding flats.

To the east, the terrain rises sharply from the marshland into the high elevations of the Coglan Buttes. This geological formation is bisected by the Coglan Canyon, creating a stark contrast between the low-lying wetlands and the upland slopes. Isolated landmarks like Shores Waterhole provide critical water sources in the drier, elevated sections of the quadrangle, while local routes such as Redhouse Rd and Lovers Ln serve as the primary connectors through this remote area.