I was run out of the first 2 places I had picked out, there were no signs but the security guard said it was off limits. After another hour of looking I found a nice new park on Pantera Drive in Diamond Bar: Thomas Guide Page 680 1E. The park (Pantera Park) is so new it's not on the map yet.
Karen KG6USN and Phil KC6SEP had 88 miles and made it in at 10:30pm after being talked in. They ran an HT into a Ramsey Electronics Doppler and having the T horizontal did not help them. When they did get a signal there was lots of multipath down the 60 and 57 freeways.