Answer: racetracks

AnswerCrossword Clue
RACETRACKS

NASCAR venues

RACETRACKS

Churchill Downs and Belmont Park

RACETRACKS

Aqueduct, Hialeah, etc.

RACETRACKS
Woodbine, Aqueduct and others.
RACETRACKS
Hialeah, Belmont, etc.
RACETRACKSSaratoga and others.
RACETRACKSOvals
RACETRACKSPimlico Belmont etc.
RACETRACKSWhere bets are made