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1990 Map of Castle Rock

Name: 1990 Topographic Map of Castle Rock
Creator: U.S. Geological Survey
Published: 1991
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1991

About this map

The Little Malheur River carves through this high-elevation landscape where the boundaries of Malheur, Grant, and Harney counties converge. The terrain is defined by prominent volcanic features like Black Butte and the namesake Castle Rock, reaching over 6,800 feet. A singular human landmark, the Goodwin Tomb, sits near the western edge of the quadrangle, suggesting a solitary history amidst the various drainage systems of Lost Creek and Bendire Creek.

Water sources are vital to this arid region, evidenced by the numerous named springs such as Whisky Gulch Springs, Irish Spring, and Campspot Spring. The presence of the Horse Flat Reservoir and Mouse Lake highlights the importance of seasonal water management in a landscape dominated by deep canyons like Jerry Canyon and narrow creek beds. This 1990 provisional survey records the intersection of ranching infrastructure and natural geology just before the turn of the 21st century.