How to get from Boston South Station to Boston North Station?
It’s a hike to walk, and it’s cold out there. Even the natives get lost. It’s at least a mile. South Station is on the Red Line. North Station is on both the Orange and Green lines. So from South Station, go downstairs to the Red Line Inbound (Alewife) and go 2 stops to Park Street. Go upstairs to the Green Line Inbound (Lechmere or North Station). Go 3 stops to North Station. You can also take the Red Line one stop to Downtown Crossing, then take the Orange Line Inbound to North Station, but I find Park easier to change trains at. HOWEVER — if you are taking an Amtrak train, don’t go all the way to South Station, get off at Back Bay Station. That is on the Orange Line already and you won’t need to mess with changing subways. Just go upstairs, then down to the subway Inbound to North Station.