A floatable boat ramp is disclosed including a plurality of hollow planks arranged parallel to one another such that the upper surfaces thereof define a drivable surface. A plurality of flexible channels couple cavities defined by adjacent planks of the plurality of hollow planks to one another a first end plank defines one or more openings to allow inlet and outlet of air and water in order to cause the boat ramp to sink or float. The interior cavity of the planks may be divided into right and left hand portions. Left and right hand channels coupled the right and left hand portions, respectively, of adjacent planks to one another. A second end plank includes a continuous cavity and allows fluid communication between left and right hand portions of the other planks. The planks may be coupled together by cables extending through sleeves rotatably mounted to the ends thereof.