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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. NNL status does not indicate public ownership, and many sites are not open for visitation.
Last Updated: June 28, 2012