Near Diablo in Contra Costa County, California — The American West (Pacific Coastal)
Mount Diablo
Photographed by Karen Key, March 8, 2009
1. Mount Diablo Marker
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.
Erected 1978 by State Department of Parks and Recreation in cooperation with the San Ramon Valley Historical Society. (Marker Number 905.)
Topics and series. This historical marker is listed in these topic lists: Exploration • Indigenous Peoples and Communities • Religion & Religious Structures • Settlements & Settlers. In addition, it is included in the California Historical Landmarks series list. A significant historical date for this entry is April 23, 1898.
Location. 37° 52.9′ N, 121° 54.85′ W. Marker is near Diablo, California, in Contra Costa County. It is on Summit Road, on the right when traveling north. Touch for map. Marker is in this post office area: Diablo CA 94528, United States of America. Touch for directions.
Regionally, this marker is in California’s San Francisco Bay Area and on the Coast Ranges. It is also on the American Pacific Coast. Globally, it is in North America, on the Ring of Fire, in the Pacific Rim, in the Western Hemisphere, in the Western World, and in the Anglosphere. Historically, it finds itself in what was once New Spain and also Mexicos Alta California.
Other nearby markers.
this page online
Also see . . . Mount Diablo State Park. California State Parks website entry (Submitted on April 2, 2009, by Karen Key of Sacramento, California.)
Photographed by Karen Key, March 8, 2009
2. Mount Diablo Marker
Photographed by Karen Key, March 8, 2009
3. Mount Diablo Summit Building
Photographed by Karen Key, March 8, 2009
4. View from the Summit Observation Deck
Mt. Zion Diabase Quarry to the North
Photographed by Karen Key, March 8, 2009
5. View from the Summit Observation Deck
Looking Southeast
Photographed by Karen Key, March 8, 2009
6. View from the Summit Observation Deck
Looking Northwest to the Bay
November 21, 2007
7. View from the Summit Observation Deck
Looking Northeast towards Sacramento.
Photographed by Karen Key, March 8, 2009
8. Mount Diablo National Natural Landmark Marker
Photographed by Karen Key, March 8, 2009
9. Mount Diablo National Natural Landmark Marker
March 22, 2009
10. View of North Peak of Mount Diablo from Marsh Creek Springs
Credits. This page was last revised on May 28, 2024. It was originally submitted on April 2, 2009, by Karen Key of Sacramento, California. This page has been viewed 3,463 times since then and 43 times this year. Photos: 1, 2, 3, 4, 5, 6. submitted on April 2, 2009, by Karen Key of Sacramento, California. 7. submitted on April 5, 2009. 8, 9. submitted on April 2, 2009, by Karen Key of Sacramento, California. 10. submitted on April 5, 2009.
