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2012 Map of Petrolia

Name: 2012 Topographic Map of Petrolia
Creator: U.S. Geological Survey
Published: 2012
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2012

About this map

The Mattole River flows through this coastal landscape, meeting the Pacific Ocean near the distinctive Mattole Beach. This 2012 survey captures the isolated settlement of Petrolia and the rugged coastal points that define the Lost Coast region. Notable landmarks along the shore include Punta Gorda, Mussel Rock, and Sea Lion Rock, while the interior is marked by significant elevation gains at Cooskie Mountain and Little Chaparral Mountain.

A network of rural routes such as Lighthouse Rd and Prosper Ridge Rd connects scattered inland features like Collins Spring and the curiously named Uncle Tommy settlement. The topography is defined by sharp ridges, including Shenanigan Ridge and Johnny Jack Ridge, which separate the various gulches and creek drainages that feed into the main river system. This map provides a detailed view of the terrain where the North Fork of the Mattole joins the primary channel.