Great South Bay Boat Ramp is a hard surface launch facility located at Captree State Park in Babylon with parking for 67 cars and trailers, making it suitable for trailered boats of various sizes.

The ramp features a boat pumpout and wash down area, though an entrance fee is required for park access. This is one of several Great South Bay launch sites managed by state parks, offering convenient access to the bay for boating and fishing activities.