Loading map...

2018 Map of Updegraff Ridge

Name: 2018 Topographic Map of Updegraff Ridge
Creator: U.S. Geological Survey
Published: 2018
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2018

About this map

Eel River and its North Fork dominate this section of the Mendocino-Trinity county line, where the water carves deep through high elevations. The tiny settlements of Ramsey and Spyrock represent the sparse human footprint in this corner of the state, connected by winding routes like Island Mountain Rd and Spyrock Rd. The geography is defined by prominent landmarks such as Island Mtn and Coyote Rock, which rise above a network of drainages including Bell Springs Cr and Blue Rock Cr.

High ridges such as Updegraff Ridge separate the various creek basins, illustrating the complex drainage patterns that feed into the river system. The presence of Horse Ranch Lake near the northern boundary provides a rare still-water feature among the numerous seasonal and perennial streams. This 2018 survey reveals a landscape where road networks like Lundblade Ranch Rd are dictated by the difficult terrain of the Coast Ranges.