The Sierra mountain range is a rugged mountain range located in the western United States. It stretches 400 miles from California to Nevada and is home to some of the highest peaks in the country, including Mount Whitney, the highest peak in the contiguous United States. The range is known for its dramatic landscapes, including deep canyons, alpine lakes, and lush forests. It is also home to a variety of wildlife, including black bears, bighorn sheep, and bald eagles.