Trona in San Bernardino County, California — The American West (Pacific Coastal)
Welcome to the Trona Pinnacles
... a National Natural Landmark
The Pinnacles were formed between 10,000 and 100,000 years ago when Searles Lake formed a link in a chain of interconnected lakes flowing from the Owens Valley to Death Valley. At one point during the Pleistocene, the spot where you are standing now was under 640 feet of water.
The Trona Pinnacles were designated as a National Natural Landmark by the U.S. Department of the Interior in 1968 to preserve one of North America's most outstanding examples of tufa tower formation.
Erected 2000 by U.S. Department of the Interior.
Topics and series. This historical marker is listed in these topic lists: Natural Features • Natural ResourcesNational Natural Landmarks series list. A significant historical year for this entry is 1968.
Location. 35° 37.007′ N, 117° 22.367′ W. Marker is in Trona, California, in San Bernardino County. Access to the site is from a BLM dirt road (RM143) that leaves State Highway 178, about 7.7 miles (12 km) east of the intersection of State Highway 178 and the Trona-Red Mountain Road. The 5.0-mile (8 km) long dirt road from State Highway 178 to the Pinnacles is usually accessible to 2-wheel drive vehicles, however, the road may be closed during the winter months after a heavy rain. Touch for map. Marker is in this post office area: Trona CA 93562, United States of America. Touch for directions.
Other nearby markers. At least 4 other markers are within 10 miles of this marker, measured as the crow flies. John & Dennis Searles Wagon Routes (approx. 4.6 miles away); Epsom Salts Monorail (approx. 4.6 miles away); Searles Lake Borax Discovery (approx. 9.7 miles away); Austin Hall (approx. 9.9 miles away).
Also see . . . Trona Pinnacles. The BLM website for the Trona Pinnacles. (Submitted on December 9, 2011.)
Credits. This page was last revised on October 19, 2020. It was originally submitted on December 6, 2011, by Michael Kindig of Long Beach, California. This page has been viewed 740 times since then and 27 times this year. Photos: 1, 2. submitted on December 7, 2011, by Michael Kindig of Long Beach, California. 3, 4, 5. submitted on December 6, 2011, by Michael Kindig of Long Beach, California. • Syd Whittle was the editor who published this page.