Jedi features 5 miles of hiking trails near Loma Linda, CA.
Coming from LA take the 10 FWY east and exit Mtn View (make a right). Continue on Mtn View until it ends. There is a small park at the foothill. Park near the dog park and there is a fire road leading you into the valley.
http://www.tripleblaze.com/trail.php?c=3&i=1963