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1990 Map of Bologna Basin
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1990 Map of Bologna Basin

USGS Topo · Published 1990

About this map

The North Fork John Day River carves through this portion of Grant County, serving as the primary drainage for a landscape defined by deep canyons and seasonal water sources. The northern reaches are dominated by the Umatilla National Forest, where features like Bologna Basin and Bologna Canyon suggest the early ranching and grazing history of the region. Significant landmarks such as Thorn Spring Butte and Ant Hill provide vertical relief above the intricate network of tributary drainages including Rains Canyon and Portuguese Canyon.

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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 Bologna Basin 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