Trona Pinnacles

Trona Pinnacles are some of the most unique geological features in California’s desert. The unusual landscape is made up of more than 500 spires, some as high as 140 feet, rising from the bed of the Searles Dry Lake basin. The pinnacles vary in size and shape from short and wide to tall and thin, and are composed primarily of calcium carbonate (tufa), like those found in Mono Lake. The pinnacles were formed underwater from 10,000 to 100,000 years ago when Searles Lake was one of a chain of interconnected Pleistocene lakes stretching from Mono Lake to Death Valley.