The Spanish Peaks Wilderness is a 19,226 acres (77.80 km sq) wilderness area in Huerfano County and Las Animas County, Colorado, USA, located 20 miles (32 km) southwest of Walsenburg. All of the wilderness area is located on U.S. Forest Service land and located within the San Isabel National Forest.
Las Cumbres Españolas, the Spanish Peaks, are prominent landmarks along the eastern front of the southern Rockies. Their snow-capped summits of the East Spanish Peak and the West Spanish Peak, rise more than 7,000 feet (2,100 m) above the arid plains, made the "Double Mountain" an easily recognizable reference point to travelers of all cultures. The West Spanish Peak with an elevation of 13,623 feet (4,152 m), overtops the East Spanish Peak which only has an elevation of 12,708 feet (3,873 m). However, this difference is not readily discernible from a distance.
The Spanish Peaks are geologically distinct from the faulted and uplifted mountains of the Sangre de Cristo Range to the west. To the geologist the Spanish Peaks are prime examples of "stocks" which are defined as large masses of igneous (molten) rock which intruded layers of sedimentary rock and were later exposed by erosion. When mapped by geologists the Peaks were found to be masses of Granite, granodiorite, and syenodiorite.
Among the most unusual features of the Spanish Peaks are the great dikes which radiate out from the mountains like spokes of a wheel. These walls of rock are often spectacular. They are easily visible from the highway north of the peaks (and west of Walsenburg), and pictures of them have been used as type examples in more than one introductory geology textbook. Several can be easily seen up close on back dirt roads, and one (Apishapa Arch) on the south side of the peaks can actually be driven through.