AT&T will expand its cell phone and wireless Internet service at the Kentucky Horse Park during the Alltech FEI World Equestrian Games, the company said Wednesday as it was declared an official sponsor of the Games.

AT&T also will provide a global positioning system that allows spectators to track the whereabouts of horses during the Games' endurance event, which will be run on a 100-mile course largely made up of private horse farms.

"We will be doing this GPS tracking for the first time," said Emmett Ross, the discipline manager for endurance who designed the course.

Ross describes endurance as "80 Kentucky Derbies at one-third the speed in one day." Ross said the tracking system is especially valuable because spectators will not be allowed on private land to watch the race.

Viewers may watch the horses start the race in the Horse Park, then follow their progress on big screens placed throughout the park until the riders return at the end of the day. The horses and riders will be shown as icons, with their competition numbers and their country's flag.

At a news conference Wednesday, AT&T officials said they will add three mobile cell sites and a new 3G cell site around the Horse Park to boost wireless capacity for those attending the Games, which be Sept. 25 to Oct. 10.