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1990 Map of Bologna Basin

Name: 1990 Topographic Map of Bologna Basin
Creator: U.S. Geological Survey
Published: 1990
License: https://creativecommons.org/publicdomain/mark/1.0/

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.

Towards the south, the terrain shifts into the Alkali Flats, an area marked by different soil compositions and more gradual slopes. Evidence of historical transportation is seen in the Wagon Road Gulch, which follows the natural contours of the land south of the river. Numerous small springs, such as Putnam Spring and Bologna Spring, highlight the critical importance of water management in this high-desert environment.