Join a Crystal Cove State Park volunteer on an Ancient Volcanoes Hike in the backcountry of Crystal Cove State Park and explore several of the park’s volcanic features. Learn about the land/seascape setting 10-11 million years ago and then head out to observe some volcanic sites in the park. Meet at the Berns Amphitheater (PCH inland at the stoplight School-State Park). $15 Parking Fee.