In an age of popular hybrids – from fairways to country roads – the Gold Cup at Santa Anita fits right in. It is not the Santa Anita Handicap, still the West’s most famous horse race, nor is it the Hollywood Gold Cup, now deceased. It is a brand-new 1 1/4-mile, main-track dirt race for ages 3 and up weighted on allowances and offered beneath the cloudless blue skies of a San Gabriel Valley summer afternoon. All comers from points east were welcome. None of them showed.