Mountain Ranch is located in Calaveras County, California. Here you will find the first cave in California made accessible to the residents and visitors for guided trips, California Caverns. These guided tours are extremely informative as you will get to know about geologic processes that led to the formation of each cavern, the role played by caverns in human culture and history. Albeit one of the many caves in the Mother Lode area, California Caverns has the largest arrangement of caves and paths.