There are a few variables to consider. Getting reliable UHF DTV
reception beyond the curvature of the earth (approximately 70 miles) is difficult. The good news is that terrain has a major impact on reception. Going over water is about the best it gets, since water is generally flat and has positive impacts on temperature for sending the signal along. Still, beyond 70 miles, unless you can get direct line-of-sight to the transmitters, the number of things that could impact reception negatively are numerous such as the height of the broadcastantenna
and the height of your antenna
. The higher the antenna
the further you should be able to receive signal.