Rt 250 ends at Rt 6, over a mile from the Cedar Point Causeway. They do not own that land. The land between the Cedar Point Causeway and Rt. 250 is filled with an off track betting place, three radio stations, numerous gas stations and hotels, restaurants, a shopping plaza, etc.
Take a look at http://www.schmidty.com/250.gif to see how far 250 is from Cedar Point.
As far as the land surrounding the Causeway to the light at Cleveland Rd / Rt 6 and the land on Chausee from the willow trees to Cleveland Rd / Rt 6, they've owned that for more like 3 or 4 decades, if not twice that in some instances.
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Cedar Point Photography
http://www.schmidty.com/cp