Spanish Peaks, located within the San Isabel National Forest, is one of the best known examples of exposed igneous dikes. Dikes are formed when molten igneous material is forced into a fracture or fault before becoming solidified. There may be over 500 such dikes in the area.
Year designated: 1976
Ownership: Federal, Private
Please remember, National Natural Landmarks (NNLs) are not national parks. NNLs are owned by a variety of public and private entities and allowing visitation is at their discretion. Many NNL sites maintain public websites where additional information may be found.