Named for the legendary military commander who led the fight for Texas independence from Mexico and later statehood, the M/V Sam Houston offers free leisurely 90-minute round-trip cruises along the Houston Ship Channel. Individuals and groups are invited to learn about the port through this enjoyable tour.The Port of Houston is an economic engine that produces jobs and economic prosperity for the local and state economy. Throughout its history, whenever the port has grown, Houston has grown. Someone once wisely pointed out that Houston is “the town that built the port that built the city.”Experience an unforgettable waterborne voyage through one of the busiest ports in the world aboard the Port of Houston Authority's free public tour boat! The Sam Houston Boat Tour is a free service of the Port Authority of Houston. You have to register about a month in advance to get a spot.