I grew up in Glendora and used to go muddin and hiking out there all the time... If any of you have the time to go up the and hike... Go to the "bridge to nowhere"... It's a easy hike but fun, they also have bungee jumping off of the bridge to nowhere at certain times if the year. Lots if fun.. If you decide to camp up there though, light a fire... There are GIANT spiders that will run right into the fore and kill themselves... I still don't know what kind of spiders they were but that is scary! At least they kill themselves.. Lol.