Drew from BRC led this last year and I went and it was a blast. And by blast I mean it is HARD but really an amazing run. Here is the info that he posted. When I get a RSVP total from here Ill let him know! Bring your trail shoes, your water bottle and some nutrition...
Join us for an trail run from downtown Larkspur to Mtn Home Inn and back. Mixture of trails and fire roads. Mostly a different routing on the way back, but not exactly a loop. About (just ;) 2500' gain, 2/3 of it on the way out. Water: definitely bring some, and refill more at Mtn Home! Food: bring some calories for the trail, and we can have some real food afterwards; open to suggestions.
All the regular reqts apply: bring water, fuel, electrolytes, marked map, prior experience with 16 miles/2500' gain on trails, and lots of positive attitude so that you can finish w/ a smile :)
Here's a map link:http://files.meetup.com/948670/Hoo%20Koo%20E%20Koo%20and%20the%20Dirty%20Ol%27%20Rail-Roads.jpg