The Stillwater Range is a mountain range located in western Nevada in the United States. It is a SSW-NNE running ridge, approximately 70 miles (110 km) long. It cuts across the center of Churchill County and extends partway into Pershing County.The Stillwater Range separates the Carson Sink (to the west) from Dixie Valley (to the east). To the north, a low pass separates it from the East Range. To the south, the Sand Springs Pass separates it from the Sand Springs Range.