My ex - remarried - do I get to stop paying support?

Yes. Under California law spousal support terminates on an ex spouse's re-marriage even if that event is not listed in judgment as a terminating event.  

This means, even if you fail to specify in your settlement agreement that support will end on re-marriage - you can still stop payments at that date. Marriage of Thorton (2002) 95 CA 4th 251.

 Contact amanda@gordonfamilylaw.com for more information.