I just rode 12 @ Weaverville on 6/19. It was put on by Team Bigfoot (teambigfoot.net) and was one of the best events I've ever been a part of. The only sad thing was that there were THREE people in the solo single speed category.
So. Go to this company's next event in Arcata on 8/28. They're nice people, they set up a really relaxed and fun atmosphere, and they're small. Even at the end of Saturday's race, the course was in nearly pristine shape--not the mush and ruts you get used to as most endurance events wear on.
Another perk is that the Arcata venue has got to be the most spouse-friendly I can imagine. A fifteen-minute walk could get them to sushi, independent film, shopping, a brewery, the university...
Come out and do this race!