The Sapphire Mountains are a range of mountains located in southwestern Montana in the northwestern United States. From a point near the Clark Fork River and the city of Missoula, they run in a southerly direction for a distance of approximately 60 miles (100 km), making up much of the border between Ravalli County (to the west) and Granite County. To the west is the Bitterroot Valley, and to the east is Rock Creek. The southern end of the range meets the larger Anaconda Range at West Pintler Peak.