Table:
text: 2008 Rolex Sports Car Series season
Schedule
Schedule
Race Classes Length_Duration Circuit Date_
EMCO Gears Classic DP/GT mi (km) Mid-Ohio Sports Car Course June 21
Brumos Porsche 250 DP/GT mi (km) Daytona International Speedway July 3
Porsche 250 Presented by Bradley Arant DP/GT mi (km) Barber Motorsports Park July 20
Circuit Gilles Villeneuve DP/GT mi (km) Circuit Gilles Villeneuve August 1
Crown Royal 200 at the Glen DP mi (km) Watkins Glen International (Short) August 8
Armed Forces 250 DP mi (km) Infineon Raceway August 23
Supercar Life 250 DP/GT mi (km) New Jersey Motorsports Park August 31
SunRichGourmet.com 1000 DP/GT km (mi) Miller Motorsports Park September 20

Question: At which race track did a race take place on September 20th in the 2008 Rolex Sports Car Series season?