How about a ride to Vegas?
After you sober up there is great riding out here:
Vally of Fire,Death Vally(best enjoyed in the Fall)Red rock canyon,Lake Meade.
Its also a few hour ride to Southern CA,I understand there is some stuff to do there too.

Bill. "I spent a lot of money on booze, birds and fast cars. The rest I just squandered." -George Best