The Penobscot River is navigable for 25 miles to Bangor but the current flows swiftly at its mouth and must be entered on a rising tide. Expect significant currents. If you made it this far Down East, you’ll be rewarded with some of the most remarkable scenery and cruising grounds a boater may experience. Slow down and savor every moment; few get to experience the treasures offered by this incredibly diverse bio-region.