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Thumb Rock, California
Thumb Rock is a pillar located in Siskiyou County, CA at N41.39654° W122.20473° (NAD83) and at an elevation of 11820 ft MSL.
It can be seen on the USGS 1:24K topographic map Mount Shasta, CA.
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Note: Coordinates in the location and feature list above are referenced to NAD83 datum.