Off of the Eldora Speedway website:

Pit Access – Pit passes, which allow access to the pit area, are available at all Eldora racing events. A pit pass also allows for admission into the grandstand area.

Minimum Age – Only persons 14 years of age or older will be admitted to pit area. Minors 14, 15, 16 or 17 years of age submit a Parental Consent, Release and Waiver of Liability, Assumption of Risk, and Indemnity Agreement/Minor’s Assumption of Risk and Release and Waiver of Liability signed by a parent (or legal guardian). No exceptions. If the waiver is not signed in the presence of an Eldora Speedway official, it must be notarized.