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2021 Map of Manor Slough

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

USGS Topo · Published 2021

About this map

Antelope Valley and the surrounding foothills of the Coast Range meet the expansive floor of the Sacramento Valley in this Colusa County landscape. The terrain transitions from the steep ridges of Sulphur Gap and the narrow corridors of Long Canyon and Boxer Valley into a highly engineered agricultural plain. This lower ground is defined by a complex network of irrigation and drainage features, including the Tehama-Colusa Canal, the Glenn-Colusa Canal, and the namesake Manor Slough.

Large-scale water management is central to the area's identity, with the Central Canal and Glenn-Valley Slough cutting through the western valley edge to support local ranching and farming operations. Highlighting the region's connectivity despite its low population density, the Antelope Valley Ranch Airport serves as a notable landmark alongside a grid of rural roads like Mills Orchard Rd and Leesville Rd that link the valley to the higher grazing lands of Blanchard Valley.