Ellis Park is a thoroughbred racetrack near Henderson, Kentucky, along US 41 between the Twin Bridges and Evansville, Indiana. It is owned and operated by Churchill Downs Incorporated. While the track is located north of the Ohio River that forms the border between Kentucky and Indiana, which would put it within Indiana, the border is based on the course o…Ellis Park is a thoroughbred racetrack near Henderson, Kentucky, along US 41 between the Twin Bridges and Evansville, Indiana. It is owned and operated by Churchill Downs Incorporated. While the track is located north of the Ohio River that forms the border between Kentucky and Indiana, which would put it within Indiana, the border is based on the course of the river at the time Kentucky became a state in 1792.