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2011 Map of Seneca

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

USGS Topo · Published 2011

About this map

Seneca occupies the southern reach of this landscape, situated at the edge of Soda Valley where the Silvies River and Shirtail Creek converge. The settlement is centered around essential infrastructure including the Seneca Post Office and the Seneca Emergency Airstrip, reflecting its role as a remote hub in eastern Oregon. The surrounding terrain is defined by a network of ranching properties such as Southworth Ranch, Oliver Ranch, and Biggs Ranch, illustrating the area's agricultural foundations.

Upland areas to the north are marked by significant landmarks like the Dry Soda Lookout and the Southworth Cemetery, which provide grounding for local genealogical research. Water management is evident through features like the Southworth Ditch, while the natural drainage system is carved by Canyon Creek and Bear Creek. The map documents a landscape of high-elevation gulches, including Sugarloaf Gulch and Sloan Gulch, connected by forest transit routes like Starr Ridge Rd.