THE ADVENTURE COLLECTIVE® · Independent discovery and booking for outdoor travel
Looking for a high-energy water activity in Marathon? Discover the floating fun of The Lagoon on Grassy Key, with trampolines and climbing walls perfect for all ages. Dive into this unforgettable aqua adventure today!
Looking for a high-energy water activity in Marathon? Discover the floating fun of The Lagoon on Grassy Key, with trampolines and climbing walls perfect for all ages. Dive into this unforgettable aqua adventure today!
Book with The Lagoon
Verified experiences and guided adventures in the surrounding area.
Operated by The Lagoon · Marathon, Florida
Marathon, Florida, offers a haven for water lovers and families seeking active, splash-filled fun, and one of its standout attractions is The Lagoon on Grassy Key. This floating paradise takes the typical aqua park experience to new heights—literally—with its expansive network of trampolines, towering climbing walls, and an obstacle course designed to challenge kids and adults alike. Sitting just offshore, The Lagoon transforms a hot day into an adventure, where friends and families can keep cool while chasing the thrill of landing perfect jumps or conquering the course solo.
What makes The Lagoon unique is its massive floating layout, anchored securely in the warm, turquoise waters of the Florida Keys. As you step onto the floating platform, you’re greeted by the buzzing energy of giggles and splashes all around. The trampolines bounce underfoot, while the climbing walls beckon adventure-seekers to test their strength and agility. The entire setup is designed to be accessible for all ages, making it an ideal spot for birthday parties, group outings, or a spontaneous day of daring fun.
Marathon itself is a compelling hub for outdoor pursuits, and The Lagoon’s presence adds an exciting aquatic dimension for travelers passing through or based nearby. Its strategic location offers a safe, family-friendly environment where memorable moments are made, whether launching off trampolines or simply soaking up the sun after a session of high-octane activity. This attraction stands out in the Keys for its combination of safety, variety, and pure fun—perfect for those wanting to add a splash of adventure to their beach day.
So, grab your swimsuit, secure your footing, and prepare for a buoyant blast at The Lagoon on Grassy Key, a true highlight among the outdoor activities in this tropical paradise.
easy.
1–2 hours.
Suitable for most fitness levels, especially with casual swimming and climbing
Children can use the trampolines if supervised, and age restrictions vary—check in with staff for details.
Yes, life jackets are available and recommended for non-swimmers or young children.
Outside food and drinks are generally not permitted; however, concessions are often available on-site.
Arriving at least 30 minutes before your preferred time helps secure a good spot and reduces wait times.
Reservations are recommended during peak season, but walk-ins are also accepted if space allows.
Staff monitor activity constantly, and safety rules are clearly posted to ensure a fun, secure experience.
The Florida Keys have a rich maritime history, with many islands once serving as key points for shipping and exploration.
Efforts are in place to protect local reefs and marine life, ensuring that activities like visiting The Lagoon have minimal ecological impact.
The Lagoon in Marathon, Florida, is a watersports center offering a broad selection of lessons, rentals, and guided experiences across the Florida Keys. It provides cable wakeboarding with unique 2-point cable systems, kiteboarding and kite-flying courses, wingboarding, E-Foiling lessons, basic sailing instruction, and stand-up paddle activities including guided downwinders. The site also hosts a large floating aqua park, Rhum Runner at The Lagoon on Grassy Key, featuring floating trampolines and climbing walls for family-friendly fun. Instruction spans beginner to advanced levels with options for private one-on-one lessons, goal-oriented advanced coaching, and combined classroom and on-water sessions. Specific programs include beginner cable reservations that mimic the feel of boat-towed wakeboarding, intro and advanced kite lessons with ground school, and tailored advanced cable reservations that allow riders to use larger features such as XL kickers and rails. Guided downwinders target experienced paddlers and kiteboarders and run with a small-group limit and shuttle service. Safety and skill progression are emphasized through structured ground school, self-rescue techniques, and controlled practice sessions. Scheduling depends on weather for many offerings, and several experiences combine shore-side instruction with water time. Courses teach kite setup, control, board starts, upwind riding, power strokes, and self-rescue to promote safe progression on the water. Private and group bookings are available for families, solo travelers, and experienced athletes looking for targeted sessions. Advance reservations are recommended.
Book with The Lagoon