American Triple Tiara of Thoroughbred Racing

The Triple Tiara of Thoroughbred Racing, formerly known as the Filly Triple Crown, is a set of three horse races in the United States which is open to three-year-old fillies. Presently, the only official Triple Tiara is the three race series in New York: the Acorn Stakes, run at Belmont Park at a distance of 1+1⁄16 miles (1.7 km), the Coaching Club American Oaks, run at Saratoga Race Course at a distance of 1+1⁄8 miles (1.8 km), and the Alabama Stakes, run at Saratoga at a distance of 1+1⁄4 miles (2.0 km).

Source: Wikipedia — American Triple Tiara of Thoroughbred Racing (CC BY-SA 4.0)