Beneath its towering palms many leading trainers prepare
their young trotters and pacers for the Grand Circuit, the touring series of prestige races primarily for 2 - and 3 - year - olds that gets into full swing in mid-June in places like Detroit, Lexington, Ky. and Saratoga, N.Y. Pompano is analogous to baseball's spring training camps: you get the athletes into shape in the South, then send them North for the regular season.