Mount Diablo

Mount Diablo (HMBH8)

Location: Walnut Creek, CA 94598 Contra Costa County
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Country: United States of America
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N 37° 52.9', W 121° 54.85'

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Mount Diablo, sacred to Native Americans who lived and worshipped there for over 5,000 years became a critical reference point for Spanish explorers in the 18th century, and American trappers and early California settlers in the 19th. In 1851 Colonel Leander Ransome established the crossing of the Mount Diablo Base and meridian lines from which most of California and Nevada are surveyed.

California Registered Historical Landmark No. 905

Plaque placed by the State Department of Parks and Recreation in cooperation with the San Ramon Valley Historical Society, April 23, 1978.
HM NumberHMBH8
Marker Number905
Year Placed1978
Placed ByState Department of Parks and Recreation in cooperation with the San Ramon Valley Historical Society
Marker ConditionNo reports yet
Date Added Sunday, October 19th, 2014 at 10:21am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)10S E 595487 N 4193241
Decimal Degrees37.88166667, -121.91416667
Degrees and Decimal MinutesN 37° 52.9', W 121° 54.85'
Degrees, Minutes and Seconds37° 52' 54.00" N, 121° 54' 51.00" W
Driving DirectionsGoogle Maps
Area Code(s)925, 510, 707
Closest Postal AddressAt or near 415 Summit Rd, Walnut Creek CA 94598, US
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