Indianapolisd

1 clue
Event first won by a Marmon Wasp
Similar answers:
Algonquinindians
Americanindians
Amerindians
Backtoindiana
Blackfootindian
Choctawindians
Clevelandindian
Crowindians
Delawareindians
Eastindian
Fivelittleindians
Frenchlickindiana
Garyindiana
Golfnightbookandindian
Grayindiana
Hamiltonlittleindians
Hopiindian
Hopiindians
Indian
Indiana