Plan your stop
Useful details
This resort is on Grassy Key, shown in the Duck Key-area view. Its official policy currently welcomes pets under 30 pounds with fees and restrictions; confirm the latest rules before booking.
Public listing information reports that dogs are welcome. Confirm current leash, patio, room, beach and restricted-area rules directly before arrival.
On Duck Key, at MM 60–65
Grassy Flats Resort & Beach Club 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 choosing a pillow that matches the mile marker, parking and the rest of the day’s water or walking plans.
Other hotels & lodging listings currently published on Duck Key include Conch Key Villas, Hawks Cay Resort, Bay View Inn / Conch Key Fishing Lodge & Marina. Compare them on the island or category hub rather than assuming this listing is the only option.
What this record includes
- Directory category
- Hotels & Lodging
- Island area
- Duck Key (Middle Keys, MM 60–65)
- Mapped as
- hotels & lodging
- Published address
- 58182 Overseas Hwy, Grassy Key, FL 33050
- Published phone
- 305-998-4590
- Official website on file
- Yes — confirm details there
- Mapped or source amenities
- Ocean-view accommodations, Beach access, Two pools, Included kayaks and paddleboards, Included bicycles, On-site dining, Sauna
- Source
- Grassy Flats Resort 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
- Parking, pet, trailer and fee rules with the property
- No ratings or “best of” rank — this page does not score or rank places
How to use this listing
Grassy Flats Resort & Beach Club is mapped as lodging in Duck Key (Middle Keys, MM 60–65). A Keys mailing address can sit well away from the marina, park or Old Town block you think you booked.
Compare the island and mile marker before the room rate. Confirm parking, resort fees, trailer or dock rules and pet policy with the property. The order of lodging listings is not for sale, and this page is not a booking engine.
Listed amenities & features
- Ocean-view accommodations
- Beach access
- Two pools
- Included kayaks and paddleboards
- Included bicycles
- On-site dining
- Sauna
This listing was reviewed using Grassy Flats Resort 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 Jul 21, 2026 using Grassy Flats Resort official website.
Business owner or traveler? Report an update →Claim or correct this listing