Greenhorn Mountain National Wilderness Area, comprising some 22,040 acres in the southern Wet Mountains, came into being through an Act of Conress in 1993. Once upon a time there were homesteads and cattle ranches in some areas out here but over time, they were abandoned and this land was incorporated into the Wet Mountains section of the San Isabel National Forest. These days there's no mechanized vehicles allowed, which includes mountain bikes and hang gliders. Except for the igneuous intrusion that forms and fills the upper rock faces of the Greenhorn Peaks, this area of the Wet Mountains is built on carved formations of 1.8 billion year old granite. The rock of the Peaks themselves plus Santana Cone and Badito Cone are from one igneous intrusion, about 25 million years ago (about the same time as the main Spanish Peaks and Mt. Mestas-Silver Mountain-Sheep Mountains intrusions).

Directions: We went to the Ophir Creek Turnoff, just north of Bishop's Castle on State Highway 165 and went west on Forest Road 360 to the intersection with the Gardner Road (FR 634). There we turned left on FR 369 and followed that to the trailhead at the end of the road. It is a long road with many twists and turns and you don't even see Greenhorn Mountain itself until you are almost on it. There are quite a number of hiking trails leading off along the way and all of it looks gorgeous.