Found.

Palmetto Scoop: "The governor who dropped off the face of the Earth
for five days was reportedly found Monday night by his staff hiking
along the Appalachain Trail. That explanation of Mark Sanford's
disappearance has puzzled many folks in South Carolina and across the
country... Well, The Palmetto Scoop have discovered the answer to all
the secrecy: the governor may have gone for a naked hike. No, really.
An Associated Press article from last week heralded Sunday -- Father's
Day -- as 'Naked Hiking Day' on the Appalachian Trail. Yes, Naked
Hiking Day."