I saw this on the Denver Post website…
Grand Prix sets schedule
By The Denver Post
Article Published: Friday, May 28, 2004
Vintage race cars will return to the Grand Prix of Denver this year, as well as a new event, a street party at Writer’s Square.
The week officially kicks off Aug. 7 with the Mini Grand Prix and Celebrity Mini Grand Prix go-kart races.
The vintage racers will take the track after the Grand Prix on Aug. 15.
link to article – http://www.denverpost.com/Stories/0,1413,36%257E89%257E2177595,00.html?search=filter