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2017 Map of Jefferson Island

Name: 2017 Topographic Map of Jefferson Island
Creator: U.S. Geological Survey
Published: 2017
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2017

About this map

Cardwell and Jefferson Island anchor this area at the confluence of the Jefferson River and the Boulder River. The landscape is defined by an intricate network of irrigation systems, including the Agricultural Ditch, Three-Jim-Ditch, and Church-Ditch, which support the agricultural operations in Boulder Valley. This reliance on water management is further evidenced by the N Fork Missouri-Ditch and S Fork-Missouri-Ditch branching across the southern terrain.

The map records significant local landmarks such as the South Boulder Cem and the South Boulder Airport, alongside the high-elevation peaks of London Peak and Cave Mtn. To the southwest, the boundary of the Deerlodge National Forest encompasses Limekiln Cr and Pole Canyon. This survey captures the rural character of the Jefferson Co and Madison County border, where small settlements like La Hood Park and Summit Valley are connected by legacy routes such as Parrot Ditch Rd and Cemetery Hill Rd.