The brown slash at about the center of the above photograph is a gigantic land-slide, and was possibly the most difficult part of the hike from Sirena to La Leona.  Large rocks from the slide were densely scattered from the edge of the slide into the ocean and repeated tides made the rocks slippery with biofilm.  Clearly, the rocks provide 0 defense from the hot sun, and, in fact, radiated heat, making slippery rocks that much more difficult to maneuver.