@knizer @shoozejim A list of #bostonHikes would be awesome.
In other direction... #BlueHillsReservation (also accessible by public transit, I believe).
And one of my favorites, #worldsEnd in #Hingham (a #trusteesOfReservations property). Not sure there's any public transit to it though... (and yeah it's really more a walk than a hike, but still!)