Carrying Place 3
There are two trails; one to what is now (hereafter w.i.n.)Whitehall and another to the south end of Lake George. The L George route requires a second portage at #Ticongeroga to get to the big lake.
Our explorer can travel up the lake to the Richelieu river as far as the rapids at w.i.n. Chambly Quebec. Another portage and flat water to the St Lawrence river and then to the Atlantic.
A 750 mile water highway: Hudson, Champlain, Richelieu, St Lawrence. With one land gap.