Pinnacles National Park is located near the city of Soledad, in San Benito and Monterey counties, in the state of California, United States. The park protects its namesake, the eroded leftovers of an extinct volcano.
As stated in the foundation document:
The purpose of Pinnacles National Park is to protect the Pinnacles Volcanic Formation, talus caves, associated lands, and ecosystems for their scientific, educational, and cultural values, by caring for their natural processes and wild character while providing opportunities for public enjoyment and understanding of these resources.