The late season bloom on this ridge includes one of the rarest and most unusual plants in the world, the Tiburon mariposa lily. We’ll look for this and other flowers as well as butterflies, birds, and other wildlife. After lunch, we’ll drive over to Old Saint Hilary’s Preserve to see the lovely Tiburon jewelflower and a number of other late blooming beauties. This walk is for ages 15 and up. We request that no pets (except service animals) attend. High fire danger may cancel: call (415) 893-9527 after 7am on the morning of the event to hear a recorded message if cancelled. David Herlocker will lead.