The Boston Fire transmitter sites use a down tilt antenna configuration so many will be harder to hear at greater distances. Also they have 5 district repeaters which haven't seen much use as of yet on 483.1500, 483.1750, 483.2000, 483.2250, and 483.2500 which are dual mode P-25 repeaters. There hasn't been much use except the occasional testing and a few encrypted transmissions.
I haven't programmed those frequencies in yet, but I might as well do so regarding your comment. Nothing to lose.
Thx.