Lone Cone is a prominent, isolated mountain in southwestern Colorado at the western end of the San Miguel Mountains in the Rockies. Rising 12,618 feet, it stands on the drainage divide between the San Juan and Uncompahgre national forests and between Dolores and San Miguel counties. Geologically, it is a laccolith, created when magma pushed upward between rock layers, and it is estimated to be between 20 and 40 million years old. It is the westernmost of a group of similar laccoliths associated with the San Juan volcanic field. Its name reflects its solitary, conical shape, and an earlier recorded name was West Point.