The hillclimb is the 2nd largest auto event in Indiana (with the Indy 500 being the first)
The first hillclimb was ran in Newport in 1909 & the event was resurrected in 1963. The website explains it more, but it's a great event with a neat history! We've been going there for years.
Here's my 1932 Indycar at the event, several years ago: