Give a stream of consciousness and then the final answer. The following is a list of giant sequoia groves. All naturally occurring groves of giant sequoias are located in moist, unglaciated ridges and valleys of the west slope of the Sierra Nevada range in California, United States. They occur between 1370 -- 2000 meters (4500 -- 6500 ft) elevation in the northern half of the range, and 1700 -- 2250 m (5500 -- 7500 ft) in the south.

Answer this question: mountain range in western us home to giant sequoia?
The relevant information is: All naturally occurring groves of giant sequoias are located in moist, unglaciated ridges and valleys of the west slope of the Sierra Nevada range in California, United States.
So, the final answer is the Sierra Nevada range.