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1990 Map of Big Swamp
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1990 Map of Big Swamp

USGS Topo · Published 1990

About this map

Ash Creek State Wildlife Area dominates this portion of the Big Valley basin along the border of Lassen and Modoc counties. The terrain is characterized by the expansive wetland of the Big Swamp and the seasonal hydrology of Ash Creek. To the north, the landscape rises into the timbered slopes of the Modoc National Forest, marked by volcanic features like Roberts Butte and Pilot Butte.

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Map Details

Date Portrayed1990
Date Published1990
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions21.9 x 26.7 inches

Editions of this 1990 Big Swamp Map

This is the sole edition of this map. No revisions or reprints were ever made.

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain