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2018 Map of Duncan Peak

Name: 2018 Topographic Map of Duncan Peak
Creator: U.S. Geological Survey
Published: 2018
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2018

About this map

Duncan Peak and the surrounding high-altitude terrain of the Tahoe National Forest dominate this Placer County landscape. The complex system of canyons and ridges is defined by the North Fork American River and its numerous tributaries, including Tadpole Cr and Big Granite Cr. The presence of the China Wall Iowa Hill Ditch, the Iowa Hill Ditch, and the Trap Line Ditch indicates the historical importance of water management for hydraulic mining or irrigation in this region.

Evidence of historical human activity is found at Mumford Bar and Sailor Flat, while the Union Tunnel suggests subsurface exploration. The geography is further articulated by numerous named canyons such as Little Secret Canyon and Screwauger Canyon. Extensive trail and forest road networks, including the Western States trail and the Sailor Flat OHV Trail, underscore the modern recreational use of this formerly industrial mountain terrain.