The Sierra Nevada is a mountain range located in California, stretching 400 miles from the Oregon border to the Tehachapi Mountains. The range is home to some of the highest peaks in the contiguous United States, including Mount Whitney, the highest peak in the lower 48 states. The range is also home to numerous national parks and forests, including Yosemite National Park, Sequoia National Park, and Kings Canyon National Park. The Sierra Nevada is an important source of water for California, providing water for agriculture, hydroelectric power, and recreation.