County outline map of California, highlighting in red the 13 counties proposed for secession to form the new state of South California. I made this myself as a derivative work from the two sources listed.
file:Map of California highlighting Riverside County.svg
file:South California proposal.png
file:Map of California highlighting Riverside County.svg: David Benbennick
file:South California proposal.png: Thatotherperson
derivative work: Mliu92 (talk)