June 7th through 9th 2013
This event is put on by the Kiwanis Club. Funds raised through this run goes to several charities in the Northern California area, ranging from Toys for Tots, and scholarships, to the maintaining of school bus stops that protect the local children from the rain.
I have never done this ride, but I hear all good things. For more info, please click on the link above for the Official Kiwanis Club Redwood Web page.