Click here for the SoCal Route Repository.

In particular, I love riding from Carlsbad, through Pendleton on Stuart Mesa to Laguna Beach, or sometimes just San Clemente. Such a great ride, with so few annoying stoplights! You can usually grab hold of a paceline passing through there--it's very popular.

For groups, these guys & gals are very congenial: North County Cycle Club (clicky)