Searles Valley: Salt Landscape and Local History

Searles Valley is a dry, endorheic basin. Searles Lake, a dry salt flat covering about 100 square kilometers, lies on the valley floor. The valley floor ranges from 1,621 feet above sea level at dry Searles Lake to about 3,300 feet at the southwestern end of the valley. These elevation figures refer to two different points: the lake bed and the southwestern end of the valley.

To understand the geography, it helps to distinguish the basin from the salt flat: the figure of about 100 square kilometers refers to Searles Lake, while the elevation figures describe different locations on the valley floor. This makes clear that the lake’s size does not refer to the area of the entire valley.

Salt Flat and Geological History

The Trona Pinnacles offer another geological point of reference. Their tufa spires are made of calcium carbonate and rise from the floor of the dry Searles Lake basin. In 1968, the U.S. Department of the Interior designated the Trona Pinnacles a National Natural Landmark. The salts and muds of Searles Lake also tell the story of how the basin formed: they were deposited during the Pleistocene and Holocene by a series of large lakes. The composition and location of the Pinnacles thus complement the lake’s depositional history. The salt flat is dry today; the deposits date to two geological periods.

Mineral History and Trona

The mining history can be traced through several dates. John Searles discovered borax on the surface of Searles Lake in 1862. Significant evaporite mineral deposits were discovered at the lake in 1863, and mining has taken place there since 1873. These dates mark different milestones: the discovery of borax, the discovery of significant deposits, and the start of mining.

Trona was officially founded in 1913 as an independent company town, operated entirely by the mining company and established to house its employees. The Trona Railway was built between 1913 and 1914. The Trona Railway Museum displays artifacts from the railway. The historical perspective thus leads from mineral extraction to the history of the town and traces of the railway, with the dates marking different developments.

Visitor Information and Trip Planning

The Trona History House was built in 1920 and is open by appointment. Arrange an appointment in advance if you plan to include the house in your itinerary. The historic site “Searles Lake Borax Discovery” is located at a roadside rest area in Trona. If you drive east, you can see the Fish Head Rocks formation. These details are different in nature: the History House has a specific access requirement, the historic site has a location, and Fish Head Rocks is associated with a stated direction of travel.

If you are considering Searles Valley for a hotel stay, you can choose between a focus on the geological landscape and one on local history. Searles Lake and the Trona Pinnacles offer a geological perspective; the mineral history, Trona as a company town, and the railway offer a glimpse into the town’s history. This comparison can help you tailor your trip to the topics that interest you most.

Explore more destinations: Highland, Adelanto, Chino, Ontario, Big Bear Lake, Colton, Phelan, Wrightwood

For the broader travel overview: San Bernardino.