racetrackers

/ˈreɪsˌtrækərz/
noun
  1. People who follow or attend horse races, especially at racetracks.
    • Experienced racetrackers know how to read a horse's form before placing a bet.
    • The racetrackers cheered loudly as the horses rounded the final turn.
    • Many racetrackers spend their weekends at the local track, studying the odds.