California Mountain is a term used to describe the mountain ranges located in the state of California. The three most prominent mountain ranges are the Nevadas, Shasta, and Sierras. The Nevadas are a mountain range located in the eastern part of the state, stretching from the Oregon border to the Mojave Desert. The Shasta range is located in the northern part of the state, and is home to Mount Shasta, the second highest peak in the state. The Sierras are located in the central part of the state, and are home to the highest peak in the state, Mount Whitney.