From Longman Dictionary of Contemporary Englishracegoerrace‧go‧er /ˈreɪsɡəʊə $ -ɡoʊər/ noun [countable] British English DSHsomeone who goes regularly to watch horse races
Examples from the Corpus
racegoer• There were a lot of half-familiar faces in the crowds; the enthusiastic racegoers from the train.• For racegoers there are no less than six racecourses within easy reach.• So, to the amazement of many racegoers, the two young jockeys escaped without even a caution.• Fortunately, most racegoers followed their own hunches while studying form over a leisurely lunch in the corporate suites.• Perhaps they were among the racegoers, waiting another chance to kidnap their quarry. 