Tri-Valley Dive Club Shadow Cliffs Dive Against Debris Share Facebook Twitter Share Email Begins Saturday, 16 September, 2017 - 8:30 AM Ends Saturday, 16 September, 2017 - 11:30 AM Locate 37.6692998, -121.841661 View on Google Maps By nlightner This is the end of summer cleanup dive of Shadow Cliffs Regional Park