Abstract: A trailer mounted boat retaining device that attaches to the bow eye bolt of a boat in order to hold the boat in place on the trailer. The retaining device consists of a Y-shaped set of padded brakets having a locking assembly at the junction. A spring-loaded trigger pin in the locking assembly is pushed by the eye bolt of the boat as it enters the trailer equipped with the invention, so that when the boat moves the pin far enough forward, a separate locking pin springs through the eye bolt of the boat holding the boat in place. A signal plate is provided that emits an audible sound when the locking pin springs into place. A separate safety bolt is also provided to hold the locking pin in place when the trailer holding the invention and boat is in motion.