Diamond Altitude via thermal in the US?

Marc Ramsey wrote:

AFAIK, there has
been exactly one thermal Diamond Altitude done out of Reno area
airports, and that was a three Diamond flight from Truckee, with remote
start at Bridgeport, down to Death Valley, dive down to near sea level,
climb back up to 18,000 feet, and return to Bridgeport.

That inspired pilot is Sergio Colacevich. He earned all three diamonds
in just one flight, that day.

Aldo Cernezzi

It has been done in thew Eastern US by a number of pilots, including
myself, from the airport at Marion, NC, using thermals off the
foothills of the Smokies to link up with the wave from Mt. Mitchell.
There were numerous wave camps there during the 1970s and 1980s.

ClydeBH