2015 Map of Petrolia

About this map

Petrolia serves as the focal point of this coastal survey, where the Mattole River and its North Fork wind through a landscape defined by sharp ridges and deep gulches. The settlement is anchored by local landmarks like the Petrolia Cemetery and connected by historic routes such as Mattole Rd and Old Mattole Rd. Along the shoreline, the survey documents a series of rocky outcrops including Mussel Rock, The Brothers, and Punta Gorda. The transition from the alluvial valley floor to the elevations of Prosper Ridge and Cooksie Mountain illustrates the area's complex drainage patterns, with numerous named watercourses like Bear Creek and Fourmile Creek feeding into the main river system before it reaches Mattole Beach.