The BMW of Nor Cal is one of the largest and oldest BMW clubs in the nation and the 49er Rally has been running for many years. It predates the National MOA rally. They hold it every year in Mariposa which offers some outstanding Road and off road riding. They get approximately 550 riders every year with a large contingent being GS riders, not all of which are off-road oriented.
They have a GS challenge course build (thanks to Dennis G) which is a really fun event as well as smaller trials course. Lance Thomas instructs two different GS clinics and leads the classes on a guided GS ride. They are looking to expand the GS training offering this year, as there is a lot of interest in ADV riding.