The geocache is not at the posted coordinates, but it is nearby
This is a short two-stage multi. The posted coordinates will take you to a wildlife observation deck, where you can view the Mugu Lagoon and read about its history. The "Rest Stop for Weary Travelers" display highlights one bird species. Enter that species into Certitudes to get the coordinates to the final.
You are looking for a bison tube, low in a crack, with a retrieval methid attached.
You can validate your puzzle solution with certitude.