1942 Map of Arched Rock

About this map

Arched Rock stands as a prominent coastal landmark on this 1942 survey of the Sonoma County shoreline. The terrain is defined by the sharp transition from the Pacific Ocean to the rising elevations of Little Black Mountain, where a network of watercourses including Russian Gulch, Jewell Gulch, and Timber Gulch carve into the landscape. This area, reflecting the mapping efforts of M. H. Ware and the Corps of Engineers during the war era, highlights a sparsely developed section of the coast where the natural drainage of the Middle Branch, West Branch, and East Branch dictates the local topography.