Join Marin County Parks for a walk through shaded forests and serpentine laced clearings with a variety of natural wonders. The upper reach of the canyon still holds water and acts as a magnet for wildlife. Remember to bring binoculars, if you have them. This walk is for ages 15 and up. They request that no pets (except service animals) attend. High fire danger cancels: Call (415) 893-9527 after 8 a.m. on the morning of the event to hear a recorded message if cancelled. Questions: Contact Dave Herlocker at (415) 893-9508.