The John Long Mountains, el. , is a small mountain range northwest of Philipsburg, Montana in Granite County, Montana. The Beaverhead-Deerlodge National Forest and Lolo National Forest manage these mountains. A sizable roadless area of about 65,000 acres existed, as of 1990, in the John Long Mountains, centered on Silver King Mountain in the southern part of the range. It's unknown whether and to what extent this area's size has been reduced by logging. Lightly used trails traverse whitebark pine forests on the higher ridges, and forests of lodgepole pine, Douglas-fir, and heavy downfall on the eastern slopes. The western slopes have groves of douglas-fir amidst extensive grassy parks. Silver King Mountain is 7,581'.