Casco Bay Sunset Lighthouse Cruise

The Sunset Run — the company's purpose-built evening lighthouse tour — threads through inner and outer harbor channels that have guided mariners since colonial shipping made Portland a major North Atlantic port. The route passes five operational lighthouses still maintained by the Coast Guard, each built between 1791 and 1875 to mark ledges, channels, and island approaches that claimed dozens of wooden vessels in the age of sail. The working beacons visible from deck include Portland Head Light, commissioned by George Washington and completed with rubblestone masonry in 1791, and Spring Point Ledge Light, a caisson-foundation tower erected in 1897 at the mouth of the shipping channel. Ram Island Ledge Light, built on a submerged granite outcrop in 1905, rises directly from open water with no adjoining land mass. Each beacon reflects a different engineering solution to coastal navigation — some perched on clifftops, others anchored to wave-swept ledges with iron pilings. The structures remain operational, their automated lamps cycling every four to six seconds to mark safe passage for container ships and lobster boats alike. Casco Bay's 136 square miles of tidal water contain more than 200 islands, most uninhabited, their rocky shores dense with spruce and exposed granite dating to the last glacial retreat. The bay's complex bathymetry — shallow inner channels giving way to hundred-foot depths offshore — creates strong tidal currents that shift direction every six hours. Evening light from the west illuminates the Portland skyline, the white clapboard houses of Peaks Island, and the steel lattice of the Casco Bay Bridge, while the eastern horizon darkens over open Atlantic water.