Abstract: A boat trailer adapted to be towed behind a vehicle, comprising a lower, boat-carrying frame and an upper, boat-guiding frame pivotally associated with the lower frame and provided with flotation devices. During launch, or recovery, of a boat into or out of a body of water, the upper frame floats pivoted from the lower frame to maintain boat restraining side rails in operable position during launch and recovery of the boat. Quickly attached and detached foot platforms are provided which allow the operator to walk along the upper frame to manually tend to the boat as necessary. A telescopingly extendible tongue is provided, to prevent the necessity of backing the towing vehicle into the water at gradually sloped launching sites.