Due west of Eastport lies a small inland sea, Cobscook Bay, with few houses and few lobster pots or boats. Farthest west are Whiting Bay Inlet and Dennys Bay Inlet – they require transiting reversing falls, with currents up to 15 knots ‒ we’ll leave them to others “braver” than we.
Between Eastport and the reversing falls is Cobscook Bay and, at its southern extremity, South Bay; therein is found Federal Harbor. The current between Eastport and Federal Harbor is at most 2 to 3 knots, so timing your passage to Federal on the flood and back to Eastport on the ebb provides a very nice lift in each direction.