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1989 Map of Twin Sisters Mtn.
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1989 Map of Twin Sisters Mtn.

USGS Topo · Published 1989

About this map

Twin Sisters Mountain dominates this high-altitude landscape in the late 1980s, where its sharp peaks of North Twin and South Twin rise above the surrounding Mt Baker Sister Mountain Wilderness. This 1989 provisional survey captures a remote wilderness environment before modern digital mapping, showcasing the drainage systems of the Middle Fork Nooksack River and the South Fork Nooksack River. Alpine water bodies like Elbow Lake, Lake Doreen, and Lake Wiseman are tucked into the high basins, while the Whatcom Co Skagit Co line cuts through the southern portion of the sheet. The map reveals the intricate network of glacial meltwater streams, including Ridley Creek and Sister Creek, which define the rugged topography of the Mount Baker National Forest.

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Map Details

Date Portrayed1989
Date Published1989
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22.2 x 27.2 inches

Editions of this 1989 Twin Sisters Mtn. Map

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain