Plan your stop
Useful details
Physically on Grassy Key (Marathon Mid Keys corridor). Adventure-park / watersports complex under Attractions—confirm schedules, age and skill requirements, waivers and weather operations on https://ridethelagoon.com/ before visiting.
On Duck Key, at MM 60–65
The Lagoon on Grassy Key sits in Duck Key (Middle Keys, MM 60–65). A compact resort island near family activities and the east end of Marathon. This listing is for a practical attractions & museums stop on this island.
Other attractions & museums listings currently published on Duck Key include Dolphin Research Center. Compare them on the island or category hub rather than assuming this listing is the only option.
What this record includes
- Directory category
- Attractions & Museums
- Island area
- Duck Key (Middle Keys, MM 60–65)
- Mapped as
- attractions & museums
- Published address
- 59300 Overseas Hwy, Grassy Key, FL 33050
- Published phone
- 305-414-8245
- Official website on file
- Yes — confirm details there
- Mapped or source amenities
- Cable wakeboarding, Floating aqua park, Family recreation, On-site dining, Surf shop and souvenirs
- Source
- The Lagoon on Grassy Key official website
Confirm before you go
- Current hours, closures, fees and access rules on the linked source
- Today’s hours — none are published on this listing
- No ratings or “best of” rank — this page does not score or rank places
How to use this listing
The Lagoon on Grassy Key is listed under attractions & museums in Duck Key (Middle Keys, MM 60–65). Use the page to place the stop on the island chain, then verify time-sensitive details on the linked source.
Hours, access, fees and services change. If the source does not give a phone number, rating or opening time, this page leaves it out.
Listed amenities & features
- Cable wakeboarding
- Floating aqua park
- Family recreation
- On-site dining
- Surf shop and souvenirs
This listing was reviewed using The Lagoon on Grassy Key official website. The official website is the right place for menus, rates, reservations and hours. Directory text is a planning aid, not a live operations feed. Last reviewed on Sep 30, 2026 using The Lagoon on Grassy Key official website.
Business owner or traveler? Report an update →Claim or correct this listing