I checked both websites for their schedule.. and nothing shows up for today.. august 17, 2009... does that mean they are closed?
http://www.byrondragway.com/Schedule.html
http://www.greatlakesdragaway.com/index.php?page=2009schedule
http://www.byrondragway.com/Schedule.html
http://www.greatlakesdragaway.com/index.php?page=2009schedule