Rumba 1430 WKOX daytime https://radio-locator.com/cgi-bin/patg?id=WKOX-AM&h=D
Rumba 1430 WKOX nighttime https://radio-locator.com/cgi-bin/patg?id=WKOX-AM&h=N Skews more to the north. Hardly goes west thanks to stations like that Fox Sports one in western NY
Talk 1200 WXKS daytime https://radio-locator.com/cgi-bin/patg?id=WXKS-AM&h=D looks fairly impressive
Talk 1200 WXKS nighttime https://radio-locator.com/cgi-bin/patg?id=WXKS-AM&h=N
If what Wimmmex and Tired of It All are saying is correct, then these maps aren't that representative of actual coverage, whether we're talking ground wave or sky wave. However, the Atlantic Ocean seems to be the best spot to pick up any Boston station.