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2011 Map of O'Brien

Name: 2011 Topographic Map of O'Brien
Creator: U.S. Geological Survey
Published: 2011
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2011

About this map

The West Fork Illinois River and its numerous tributaries, including Rough and Ready Creek and O'Brien Creek, define this pocket of Josephine County. The community of O'Brien is central to the area, marked by the O'Brien Post Office along the main transit corridor. Evidence of the region's industrial and aeronautical history is visible through the Illinois Valley US Forest Service Airstrip and the nearby Siskiyou Aerial Project Complex.

Resource management and mining have left a permanent mark on the landscape, notably at the Esterly Mine near French Flat and the Rough and Ready Mill Pond Dam. The terrain transitions from the low-lying Elk Valley to prominent landmarks like Gilligan Butte and Lone Mountain. Remote reaches are accessible via a network of forest service roads, such as Nat For Dev RD 4803, which climb toward Bearcamp Ridge.