http://www.churchilldowns.com/tickets/ticketing-policy
"Churchill Downs is a privately owned facility and may refuse the admission of any patron for any reason, including failure to abide by its admission policy.
All patrons are subject to a search of their person, packages and containers during admission. Patrons have the right to refuse to be searched, but they will not be allowed admission if they do not consent to the admission search or if they attempt to enter with any item not permitted by Churchill Downs. The admission fee of any patron who does not wish to be searched or comply with this admission policy will be refunded."
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The following items may not be brought onto the premises: weapons (including concealed weapons), umbrellas are prohibited on Oaks, Derby and Breeders’ Cup days, missiles (or any item which may be used as such), thermoses, backpacks, luggage, duffel bags, wagons, balloons, grills, charcoal, glass, tents, alcohol or any substance which is prohibited by Kentucky or Federal Law. Attempts to bring them onto the premises will result in confiscation or refusal of access to the premises. This list is illustrative only. Other items may be prohibited as a condition of admission."