For 2009 and 2009 only, there will be a 100K version of Twin Peaks! (in addition to the 50K or 50M). Since 2009 is the last year for Twin Peaks, this will be a one time only event.
The course is still pending. I have 3 different route options. The first carries a guaranteed approval from the US Forest Service. The other two have varying degrees of possibility depending on pending trail openings.
Currently there are no 100K trail races in Socal (and only a couple in CA) so if you are itching to run that distance, now is your chance!
The 100K race starts at 5AM and has an 18 hour time limit.