Radial dike near the Spanish Peaks. Photo: colorado.com
Spanish Peaks is one of the most spectacular examples of exposed igneous dikes. It’s situated in the San Isabel National Forest, west of Trinidad.
Designated in 1976, this natural landmark engulfs an enormous 37,678 acres. Parts of it are located on both federal and private land, so watch for signs when visiting.
National Natural Landmark in Huerfano and Las Animas Co.
These unique dikes are produced when volcanic material is crammed into fractures and faults, before it hardens. More than five hundred dikes are thought to reside in this national natural landmark.
Spanish Peaks is also a designated national wilderness area in Colorado, offers a plethora of outdoor recreation.
Address: near Trinidad
Ownership: Federal & Private