Just outside of Los Angeles, in the Santa Susana Mountains, is a park called Rocky Peak. Exactly as it sounds, this large wild, natural area is full of sandstone rocks and boulders that cover rolling hills and peaks that overlook the city. Rocky Peak Park has trails that are popular for hiking, dog walking, and horseback riding. One of these hikes, Hummingbird Trail, leads to a hidden cave in Simi Valley, California, that only the intrepid discover.

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This hidden cave in Simi Valley is thrilling for those who conquer the Hummingbird Trail loop. Have you hiked in Rocky Peak Park, perhaps even getting to swing in the cave? Share your thoughts and experiences with us in the comments! For a slightly less strenuous, but equally beautiful, hike in the area, consider Coyote Park, Long Canyon. If you love hiking, be sure to check out our Ultimate Hiking Packing List.

Check out more of our favorite outdoor activities and nature adventures in Southern California.

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