Lone Cone (Colorado)
Lone Cone is a prominent mountain summit at the western end of the San Miguel Mountains range of the Rocky Mountains of North America. The peak is located west by south (bearing 262°) of the Town of Telluride, Colorado, United States, on the drainage divide separating San Juan National Forest and Dolores County from Uncompahgre National Forest and San Miguel County. Geology. The mountain, a laccolith, is between 20 and 40 million years old and is the westernmost of over a dozen laccoliths that are the same age as rocks in the San Juan volcanic field