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2020 Map of Rocky Reef

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

USGS Topo · Published 2020

About this map

Chestnut Valley dominates this section of Cascade County, where the plains meet the dramatic rise of the northern Big Belt foothills. The Missouri River cuts through the northwest corner, shadowed by Old US Hwy 91 and the riparian wetlands of Vintinger Slough. Human engineering is evident in the Chestnut Valley Canal, which skirts the base of the higher elevations to manage water across the lower ranchlands.

South of the river, the landscape becomes increasingly vertical, defined by the namesake Rocky Reef and the prominent peak of Harris Mtn. This area is carved by numerous drainages, including Bird Cr and N Fork Sheep Cr, which flow through steep terrain toward the river basin. For those researching local history, the Chestnut Valley Cem remains a quiet landmark on the plateau overlooking Cherry Coulee, marking the long-established agricultural presence in this part of Montana.