A boat hoist utilizing a lightweight frame for support of a moving platform, which traverses the frame lifting the watercraft above the surface of the water. Minimal force applied to a single hand wheel on a winch, and pulley system with a flexible cable, will provide the drive to lift and lower the moving platform. This invention distributes the load between the four-roller assemblies without creating undue torsional and/or twisting force to the moving platform, the load is carried by roller assembly and frame and not solely the flexible cable. The dual inclined roller surface, pulley system, and roller wheels reduce the force required to raise the platform. Legs support the lightweight frame assembly, and are adjustable to accommodate uneven terrain on the bottom surface. This system utilizes fewer flexible cables and moving parts than traditional systems, as well as all moving parts remain above the waterline during storage for improved reliability and reduced maintenance.