You can check out my article at ca.milesplit.com at the link below which includes several Northern California runners. If you think there are other runners that deserve mention like Las Lomas senior Preston Norris, please feel free to list them in the comment section.
http://ca.milesplit.com/articles/247335-2018-boys-early-season-top-10-california-xc-runners
http://ca.milesplit.com/articles/247335-2018-boys-early-season-top-10-california-xc-runners