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2020 Map of Jefferson Island

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

USGS Topo · Published 2020

About this map

Cardwell and Jefferson Island anchor this landscape where the Jefferson River and Jefferson Slough navigate the valley floor. The map documents an intricate network of water management features essential to local agriculture, including the Agricultural Ditch, Three-Jim Ditch, and Dogtown Sewer. These systems weave through the lowlands between the London Hills to the east and the rising slopes of the Tobacco Root Mountains to the southwest.

Local landmarks and infrastructure are well-defined, from the South Boulder Airport and South Boulder Cem to the rugged boundaries of the Deerlodge National Forest. Significant elevation changes are marked by Cave Mtn and London Peak, providing a clear view of the transition from river bottom to high mountain terrain. The inclusion of named local routes like Cemetery Hill Rd and Parrot Ditch Rd provides specific points of reference for those tracing family history or land use in Jefferson and Madison counties.