DEL MAR RACETRACK
Race operator: Del Mar Thoroughbred Club.
Location: Del Mar Fairgrounds.
2010 attendance: 662,521.
2010 bets placed: $448.9 million.
Regional economic impact: $125 million to $135 million.
2011 season: Runs from July 20 through Sept. 7.
Preparing for the 72nd season of horse racing at Del Mar Fairgrounds, which begins July 20 and runs through Sept...