I've been down Tesla Rd out of Livermore a couple of times, and I've seen this place, but there never seemed to be anyone there. There's this big hill, scarred from what looks like generations of hill-climbers. There's a pic of it on Pashnit. [URL]http://pashnit.com/roads/cal/CorralHollow.htm[/URL] I just wondered if they ever have events or competitions there that might be fun to watch.