"Devils Postpile" by U.S. National Park Service , public domain

US Topo 7.5-minute

CA Timer Knob 2021

US Topo 7.5-minute map of Timer Knob Quadrangle in California. Published by the U.S. Geological Survey (USGS).

US Topo 7.5-minute map of Timer Knob Quadrangle in California. Published by the U.S. Geological Survey (USGS).

covered parks

source

U.S. Geological Survey (USGS), December 2021

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