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1990 Map of Slickear Mtn
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1990 Map of Slickear Mtn

USGS Topo · Published 1990

About this map

The Umatilla National Forest defines this high-elevation landscape where the boundaries of Morrow Co and Grant Co meet. The terrain is characterized by a complex system of deep drainage basins, most notably where the North Fork John Day River and the Middle Fork John Day River converge into the main branch of the John Day River. This confluence represents a critical hydrological junction in the region, surrounded by prominent peaks such as Slickear Mtn and Murphy Mtn. The map reveals a remote environment shaped by seasonal watercourses like Potamus Creek and Elder Creek, which carve out numerous named passages including Slickear Canyon and Wrightman Canyon. Navigational waypoints such as Fourmile Gap and Twomile Gap indicate the historical routes through the rugged divide between the various river forks.

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Map Details

Date Portrayed1990
Date Published1990
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions21.9 x 26.9 inches

Editions of this 1990 Slickear Mtn Map

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

Historical Maps of Grant County Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain