The Lagoon on Grassy Key

The Lagoon on Grassy Key is a watersports and day-adventure park at 59300 Overseas Highway, mile marker 59 in Marathon, built around a lagoon on Grassy Key. Keys Cable runs a cable wakeboard system with a separate beginner cable for first-time riders and a main line for stronger riders, and private sessions come with basic coaching matched to your level. Alongside the cable, The Rhum Runner Aqua Park floats an inflatable obstacle course on the water, while Bongo's Botanical Beer Garden and the Lagoon Saloon Surf Shoppe round out the property. Kiteboarding lessons here are recommended for ages 8 and up, and the park pairs with the adjacent Grassy Flats Resort for stay-and-play visitors.