For the purposes of the NORCAL and SOCAL mailing lists, the boundary between Northern California and Southern California is the line that runs east to west between Monterey and San Luis Obispo counties as it is the only one that runs all the way across California from the Pacific Ocean to Nevada. Anyone looking at a map of the state will find the line very easily. For a visual, visit: http://media.maps.com/magellan/Images/CALCOU-W1.gif -- Yvonne Bowers, Sonoma, CA. Listmom, WebMom NORCAL, SOCAL, CA-CORNISH NORCAL LIBRARY http://homepages.rootsweb.com/~yvonne/norcallib.html NORCAL Genealogy Index http://homepages.rootsweb.com/~yvonne/NORCAL%20index/