I was talking with pegleg (Eric) at breakfast this morning about some of the places he used to race and ride in SoCal. Glen Helen came up... and that reminded me the AMA district 37 club started holding a hard enduro at Glen Helen a couple years ago.
Here's the official 2012 video. The video was edited, obviously, but it's been a while since I've seen this many endos and crashes in one video.
Here's a helmet cam vid that gives a better perspective of the course. I don't think I'd have the skill or stamina to finish something like this but it does make me want to get out and practice. :)