Stony Mountain is a 12,698-foot summit in southwest Colorado near Ouray, in the Sneffels Range of the San Juan Mountains within the Rocky Mountains, west of the Continental Divide. Managed as part of Uncompahgre National Forest, it stands near Potosi Peak and Mount Emma and helps enclose Yankee Boy Basin with other nearby summits. Its eastern slope is especially steep, rising about 2,000 feet above Sneffels Creek in less than a mile. The mountain’s runoff feeds tributaries of the Uncompahgre River. Its name was in use by 1899, when Henry Gannett included it in A Dictionary of Altitudes in the United States, and it was later officially adopted by the United States Board on Geographic Names.