TwinSpires’ 7/11 Sweepstakes July 4th just became the second most important day of the month thanks to the TwinSpires.com 7/11 Sweepstakes…..Just bet at least $25 on Arlington Park’s Million Preview Day and Calder’s Summit of Speed races with your TwinSpires.com wagering account and you could win a VIP trip to one of those tracks. Two lucky winners will pack their bags for either the Arlington Million on August 8th or Calder’s Festival of the Sun on October 17th. Play Arlington and Calder on July 11th and you could punch your VIP ticket to Chicago or Miami. TwinSpires.com. Where Players Win.Official rules here.