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1998 Map of Seven Lakes Basin

Name: 1998 Topographic Map of Seven Lakes Basin
Creator: U.S. Geological Survey
Published: 2003
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2003

About this map

The South Fork Sacramento River begins its descent here, set against the massive geological forms of the Castle Crags and Gray Rocks. This high-altitude landscape is defined by the Seven Lakes Basin, a cluster of alpine waters including Upper Seven Lake and Lower Seven Lake. The terrain is marked by the presence of the Pacific Crest National Scenic Trail, which traverses the high ridges near Boulder Peak.

Historically, the map records the traces of mountain industry and transit, such as the Ruby Pearl Mine and the Whalan Station (Site). The convergence of the Trinity River headwaters and the Castle Creek drainage illustrates the complex hydrology of the Shasta-Trinity National Forest. Names like Horse Heaven Meadows and Grader Gulch suggest a history of grazing and early mountain access through this part of the Siskiyou and Trinity county line.