 San Simeon began his racing career on 11 November 1978 at Bunbury, 175 kilometres south of Perth.He immediately began his 29 race winning sequence by winning all 10 starts as a two-year-old including the WA Golden Slipper and WA Champagne Stakes.He was voted Australian two-year-old (2yo) of the year for 1978/9, and the $50,162 he earned that season was a new Australian record for a horse of his age.