The Western Suburbs Motor Cycle Club approached Sydney Smith for a loan of the paddocks, known as Belmore Park, situated to the west of Smith's home, Thornton Hall. The speedway opened on the Easter weekend of 1924. In 1925, Smith and his family floated Penrith Speedway as a public company. In 1925 Penrith Speedway was declared the world's largest dirt track. The last meeting of the Speedway was held in May 1941. Bill Reynolds was the English titleholder. The land where the speedway sat is now Thornton Oval.
