The horizon (supposed "clear line of site) is about 62 miles for an analog tv broadcasting station. That means that at that time, unless you have a MUCH higher tv tower and antenna, (and/or the station does) it's not possible to receive a tv station 24/7 365 days much beyond that distance. Without bouncing the signal off the ionosphere that is. Now that we have so called "better" digital tv (HA!), you have even more issues, as it's pretty much "all or nothing". You CAN'T get a snowy, but viewable DIGITAL signal, which you could with analog.
Back in the mid to late 1980's, in Bridgeport Michigan, with a 55ft tower, high gain 91XG UHF antenna, and Winegard 36db gain, 1 db noise (I still have it! but I don't live in Bridgeport anymore) lna, I could routinely pick up stations from Chicago, Ohio, Canada, Pennsylvania. Snowy, but watchable. I even picked up a station from FLORIDA once! That's like 1,200 miles! For a little while at least. The Ohio station was what I was specifically aiming for, and it was 135 miles away. I could get it 95% of the time, but even with my setup, it was usually a bit snowy.