The wooly mammoth run is run every month, you'll have to keep checking back for the date. Usually on a Saturday but the date may change from month to month. They meet at the Starbucks on Topanga and Lassen: 9935 Topanga Canyon Boulevard Chatsworth, California 91311at 6 am and race at 7am. They run the same hill every time. This hill is not and easy hill to navigate, it has sharp turns and blind corners, so it's best for a veteran racer to handle. Mike 13 is the organizer of this event, this is not an official SFVISBF event, nor does it follow it's rules or charter. I left his e-mail but he most likely won't get back to you, that's just the way he is, sorry Mike, it's the truth...There are no rules for cars etc...so if you have a trike or some other thing that we won't allow, then here's your chance to run it. Keep in mind it's still a soapbox race so don't show up with a go-kart! The hill is not safe for large numbers of drivers but if you've wanted to race and have not been able to, now's your chance. Not safe: You've been duly warned.