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2023 Map of Bologna Basin

Name: 2023 Topographic Map of Bologna Basin
Creator: U.S. Geological Survey
Published: 2023
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2023

About this map

The North Fork John Day River carves a significant course through this landscape, creating a distinct riparian corridor that transitions into the high country of the Umatilla National Forest. The topography is defined by sharp elevation changes, ranging from the river’s Big Bend to prominent landmarks like Columbus Sewell Knob and Thorn Spring Butte. This area reflects the rugged interior of Grant County, where land management boundaries intersect with historic naming conventions for springs and canyons.

Water sources such as Putnam Spring and Tommy Cork Spring are scattered throughout the basin, suggesting their importance for grazing and forest travel. The presence of the Bologna Trl and the Bologna Basin indicates a geography tied to early ranching or travel routes. Further south, the landscape opens into Alkali Flats and the winding drainage of Rudio Creek, illustrating the complex drainage systems that feed into the John Day watershed.