Sorry to do this but I have to go back to WilliamsF1's. I can't believe that is the Glen, which corner do you think it is?
To me that is exactly turn 1 at Road America, supported by the lack of pavement to the right (left as a driver) and in the runoff area (which I'm almost positive was paved at Watkins Glen by 2005 when that photo was taken). Also the Toyota branded starters position has been Toyota branded like that for years. Finally, the Brian Redman Challenge is happening this weekend again in Elkhart Lake at Road America (link:
http://www.roadamerica.com/Races/RaceIn ... asp?id=244 ).
Anyways, can't wait to hear from Williams about it.
EDIT: 100% that is Road America, as another photo in the album shows a garage labeled Road America Center and a grandstand (or something) sponsored by the Elkhart Lake Lions Club.