 The year 1905 saw the opening of Belmont Park on part of the western edge of the Hempstead Plains.Its mile and a half main track is the largest dirt Thoroughbred race course in the world, and it has the sport's largest grandstand.The South Westbury section of the plains is (appropriately) known as Salisbury, and Nassau County's largest park (more than 800 acres (3 km²)) was established in the region as Salisbury Park in the 1940s, on the site of the former Salisbury Golf Links.