Located on a private beach, Grassy Flats Resort & Beach Club offers an unforgettable getaway. Enjoy ocean views from The Rhum House restaurant or unwind by the poolside bar and firepit. Guests love the helpful staff and appreciate activities like kayaking, fishing, ecotours.
Marathon, FL (MTH-Florida Keys Marathon) - 9 min drive
Restaurants
The Island Fish Company - 6 min drive
Circle K - 7 min drive
Sparky's Landing Fish and Cocktails - 6 min drive
Circle K - 6 min drive
Angler & Ale - 4 min drive
About this property
Grassy Flats Resort & Beach Club
Grassy Flats Resort & Beach Club puts you within a 10-minute drive of Curry Hammock State Park and Coco Plum Beach. Guests can take a dip in one of 2 outdoor pools or grab a bite to eat at The Rhum House, which serves local and international cuisine and is open for dinner. Other highlights include a poolside bar, a hot tub, and a sauna. Fellow travelers love the helpful staff and overall property condition.
At a glance
DONE
Hotel size
38 rooms
Arranged over 3 floors
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Arriving/Leaving
Check-in start time: 4:00 PM; Check-in end time: 9:00 PM
Late check-in subject to availability
Minimum check-in age: 21
Check-out time is 11:00 AM
Late check-out subject to availability
DONE
Special check-in instructions
The front desk is open daily from 8:00 AM - 8:00 PM
Guests will receive an email within 24 hours before arrival with check-in instructions; front desk staffed during limited hours
If you are planning to arrive after 9:00 PM please contact the property in advance using the information on the booking confirmation
Information provided by the property may be translated using automated translation tools
DONE
Required at check-in
Credit card, debit card, or cash deposit required for incidental charges
Government-issued photo ID may be required
Minimum check-in age is 21
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Children
No cribs (infant beds)
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Pets
Pets allowed (dogs only, up to 30 lbs per pet)*
Service animals welcome
Specific rooms only*
Pets must be supervised
WIFI
Internet
Free WiFi in public areas
Free WiFi in rooms
LOCAL_PARKING
Parking
Free onsite self parking
Wheelchair-accessible parking and van parking on site
Electric vehicle charging point on site
DONE
Other information
Smoke-free property
Property amenities
Food and drink
Cooked-to-order breakfast (surcharge) each morning 6:00 AM–11:00 AM
Restaurant
Bar/lounge
Poolside bar
Charcoal grills
Water dispenser
Traveling with children
Children's menu
Children's games
Pool gate
Paddleboard on site
What to do
Kayaking
Canoe
Sailing
Windsurfing
Paddleboard on site
Fishing
Ecotours nearby
Jet skiing nearby
Water skiing nearby
Services
Front desk (limited hours)
Concierge services
Multilingual staff
Bicycle rentals
Beach sun loungers
Beach towels
Beach umbrellas
Bike storage
Pool loungers
Pool umbrellas
Water sports equipment
Paddleboard on site
Romance packages
Facilities
3 buildings/towers
ATM/banking
2 outdoor pools
Bicycle parking
Hot tub
Sauna
Locally sourced food is prioritized
At least 80% organic food
Vegan dining options
Vegetarian dining options
Local artist showcase
Uses some LED lighting
Comprehensive food waste policy
Waste recycling policy
No plastic soda bottles
No plastic coffee stirrers
No plastic drinking straws
No plastic water bottles
Water dispenser
Reusable cups only
Reusable tableware only
Dock
Firepit
Outdoor furniture
Accessibility
Elevator
Elevator door width (inches): 36
Wheelchair-accessible path of travel
Wheelchair-accessible parking
2 on-site accessible parking spaces
Wheelchair-accessible public washroom
Wheelchair-accessible van parking
Wheelchair-accessible path to elevator
Wheelchair-accessible pool
Wheelchair-accessible restaurant
Visual alarms in hallways
Well-lit path to entrance
Stair-free path to entrance
Pool hoist on site
Room amenities
Be entertained
43-inch flat-screen TV
Premium cable channels
Home comfort
Air conditioning (climate-controlled)
Iron/ironing board
Sleep well
Hypo-allergenic bedding
Blackout drapes/curtains
Bed sheets provided
What to enjoy
Furnished balcony/patio
Freshen up
Eco-friendly toiletries
Hair dryer
Towels
Toilet paper
Stay connected
Free WiFi
Electrical adapters/chargers
More
Daily housekeeping
Access via exterior corridors
Eco-friendly toiletries
Bulk dispenser for toiletries
Eco-friendly cleaning products provided
Energy-saving switches
Uses some LED lighting
Recycling
Water-efficient showers only
Water-efficient toilets only
Special features
Dining
The Rhum House - Overlooking the ocean, this steakhouse specializes in local and international cuisine and serves dinner only. Guests can enjoy drinks at the bar. A children's menu is available. Reservations are required.
The Palm Deck - Overlooking the ocean, this rooftop bar specializes in local cuisine and serves dinner and light fare. Happy hour is offered. Open select days.
Grassy Key Market - This coffee shop specializes in American cuisine and serves breakfast, lunch, dinner, and light fare. Guests can enjoy drinks at the bar. A children's menu is available. Open daily.
Fees & policies
Mandatory fees
You'll be asked to pay the following charges by the property at check-in or check-out. Fees may include applicable taxes:
Resort fee: USD 48 per accommodation, per night
Resort fee inclusions:
Additional inclusions
Beach access
Beach loungers
Beach towels
Bicycle storage
Housekeeping
In-room bottled water
In-room coffee
Lending library access
Pool access
Spa access (may be limited)
Hot tub access
Optional extras
Cooked-to-order breakfast is offered for an extra charge of approximately USD 5 to 30 per person
Late check-out can be arranged for an extra charge (subject to availability)
Renovations and closures
The following facilities will be closed during the summer:
Bar/Lounge
Children & extra beds
Guests must contact this property in advance to reserve cribs/infant beds
Pets
Service animals exempt from fees
Pets are allowed for an extra charge of USD 50 per accommodation, per night
Pool, spa, & gym (if applicable)
Pool access available from 7:00 AM to 10:00 PM
Policies
This property has outdoor spaces, such as balconies, patios, terraces which may not be suitable for children. If you have concerns, we recommend contacting the property prior to your arrival to confirm they can accommodate you in a suitable room.
Only registered guests are allowed in the guestrooms.
Some facilities may have restricted access. Guests can contact the property for details using the contact information on the booking confirmation.
Guests can rest easy knowing there's a carbon monoxide detector, a fire extinguisher, a smoke detector, and a first aid kit on site.
This property welcomes guests of all sexual orientations and gender identities (LGBTQ+ friendly).
The name on the credit card used at check-in to pay for incidentals must be the primary name on the guestroom reservation.
This property accepts credit cards, debit cards and cash.
Credit cards accepted: Visa, Mastercard, American Express, Discover
Cashless transactions are available.
Also known as
Grassy Flats & Club Marathon
Grassy Flats Resort & Beach Club Marathon
Grassy Flats Resort & Beach Club Hotel Marathon
Grassy Flats Resort & Beach Club Hotel
Grassy Flats & Club Marathon
Grassy Flats Resort & Beach Club Hotel
Grassy Flats Resort & Beach Club Marathon
Grassy Flats Resort & Beach Club Hotel Marathon
Frequently asked questions
Does Grassy Flats Resort & Beach Club offer free cancellation for a full refund?
Yes, Grassy Flats Resort & Beach Club does have fully refundable room rates available to book on our site. If you’ve booked a fully refundable room rate, this can be cancelled up to a few days before check-in depending on the property's cancellation policy. Just make sure to check this property's cancellation policy for the exact terms and conditions.
Is there a pool at Grassy Flats Resort & Beach Club?
Yes, there are 2 outdoor pools. Guests have pool access from 7:00 AM to 10:00 PM.
Are pets allowed at Grassy Flats Resort & Beach Club?
Yes, dogs are welcome, with a maximum weight of 30 lbs per pet. There's a charge of USD 50 per accommodation, per night. Service animals are exempt from fees.
Is parking offered on site at Grassy Flats Resort & Beach Club?
Yes, there's free self parking. Electric vehicle charging is available.
What are the check-in and check-out times at Grassy Flats Resort & Beach Club?
Check-in start time: 4:00 PM; Check-in end time: 9:00 PM. Check-out time is 11:00 AM. Late check-out is available for a charge (subject to availability).
What is there to do at Grassy Flats Resort & Beach Club and nearby?
Have fun with onsite activities like kayaking, sailing, and windsurfing. Additional recreation nearby includes ecotours. Relax in the hot tub or enjoy the use of other amenities, which include 2 outdoor pools and a sauna.
Are there restaurants at or near Grassy Flats Resort & Beach Club?
Yes, The Rhum House offers local and international cuisine and ocean views.
Does Grassy Flats Resort & Beach Club have any outdoor private spaces?
Yes, every room features a furnished balcony or patio.
What's the area around Grassy Flats Resort & Beach Club like?
Grassy Flats Resort & Beach Club is a short 10-minute walk from Sunset Park Beach and 17 minutes' walk from Curry Hammock State Park.
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Reviews
Reviews
9.4
Exceptional
All reviews shown are from real guest experiences. Only travelers who have booked a stay with us can submit a review. We verify reviews according to our guidelines and publish all reviews, positive or negative.
9.8
Cleanliness
9.2
Location
9.6
Staff & service
9.4
Property conditions & facilities
Guest review summary
What guests liked
The pool area was clean, relaxing, and enjoyable with great views. (45 reviews)
The spa, pool, and hot tub were very clean and enjoyable, providing a relaxing experience. (11 reviews)
The beach area was beautifully kept, well-maintained, and offered various activities and stunning views. (20 reviews)
From real guest reviews summarized by AI.
Popular mentions
Service staff
Room
View
Restaurant
Food
Beach
Location
Adults
Ocean
Breakfast
Reviews
Verified
10/10 Exceptional
Apr 19, 2026
Nice pol and hot tub. The restaurant up front serves breakfast and fresh baked items along with lunch options. Their food and coffee was excellent!
Christine
Christine, 3-night trip
Verified
10/10 Exceptional
Feb 7, 2026
Staff was very friendly and helpful. Nice room at a beautiful location. Really enjoyed the beach and pools.
Lance
Lance, 4-night trip
Verified
8/10 Very good
Feb 26, 2026
Comfortable room, clean
Scott
Scott, 4-night trip
Verified
8/10 Very good
Feb 5, 2026
Fabulous location with amazing views. Shout out to Mia in reception, very helpful and friendly.
Stuart
Stuart, 6-night trip
Verified
10/10 Exceptional
Jan 3, 2026
fantastic place with great restaurant and all the staff super!
will be back next year Daniele
daniele
daniele, 5-night trip
Verified
10/10 Exceptional
Jan 10, 2026
Breakfast was great
Andrea
Andrea, 3-night trip
Verified
10/10 Exceptional
Dec 3, 2025
Amazing stay, perfect small hotel with lot of activities
Dorothy
Dorothy, 1-night trip
Verified
10/10 Exceptional
Jan 27, 2026
Clean, beautiful room with great view. Several good food and drink options. Great location on the water.
Joseph
Joseph, 7-night trip
Verified
10/10 Exceptional
Jan 25, 2026
This hotel was really lovely. The adults only pool and proximity to the water is amazing- the staff were friendly. I also like that the coffee opens at 6am.
Melanie
Melanie, 3-night trip
Verified
10/10 Exceptional
Nov 11, 2025
Great staff, check in, site tour and dinner in the restaurant.
David
David, 1-night trip
Verified
10/10 Exceptional
Dec 17, 2025
Beautiful grounds, clean rooms.and nice staff. Great location.
Steven
Steven, 3-night trip
Verified
8/10 Very good
Jan 20, 2026
Staff was very kind. Room was clean beautiful views
Debbie
Debbie, 3-night trip
Verified
8/10 Very good
Feb 6, 2026
Rooms were clean but the staff were nice and helpful. Both their restaurants were closed the whole time.
Kevin
Kevin, 4-night trip
Verified
10/10 Exceptional
Dec 30, 2025
The staff was amazing!
Kathleen
Kathleen, 7-night trip
Verified
10/10 Exceptional
Jan 22, 2026
The room was great and very clean with a spectacular view. The staff was extremely friendly and helpful. Housekeeping was great as well. We loved the pool area and beautiful views. We will definitely be back!
Leann
Leann, 7-night trip
Verified
10/10 Exceptional
Feb 1, 2026
Exceptional services.
Carlos
Carlos, 2-night trip
Verified
10/10 Exceptional
Jan 5, 2026
Beautiful resort, felt like a deserted island. Perfect to set! Staff was very friendly and helpful. Really enjoyed our quick getaway!!
Yelena
Yelena, 4-night trip
Verified
10/10 Exceptional
Nov 7, 2025
Beautiful location, very nice room, amenities galore, extremely accommodating staff.
Paul
Paul, 1-night trip
Verified
10/10 Exceptional
Feb 17, 2026
Our room was absolutely spotless and was cleaned and remade each day were guests at Grassy Flats. The peacefulness of the property was what sold me to book our stay - we could not have been happier with this aspect! Every single member of the staff we encountered seemed concerned with us like we were the only guests on the property and our comfort and satisfaction were the most important things. After our stay, my wife and I have decided this will be an annual vacation for us!
Donald James Williamson
Donald James Williamson, 3-night trip
Verified
10/10 Exceptional
Feb 9, 2026
We loved this resort. It is a great location as you can go anywhere to do things in the Keys in an hour or so. Our room was great, and the view from the patio looking through the palm trees was fantastic. The staff was friendly and helpful. The weather turned cold and we were not able to take advantage of the ocean, but the pool was heated nicely and we enjoyed it.
Howard
Howard, 4-night trip
Verified
10/10 Exceptional
Jan 10, 2026
Beautiful room and grounds. Everything was clean and well cared for. Staff was friendly and attentive. The views were glorious!
Michael
Michael, 3-night trip
Verified
10/10 Exceptional
Jan 18, 2026
The property and room were spotless. Very pretty, kind staff, and amenities excellent! We stayed in The Conch House and had everything we needed. We felt very welcome. We had an excellent meal at the Rhum House and found what we needed at the market. We very much enjoyed a relaxing and beautiful vacation at Grassy Flats!
Mindy
Mindy, 7-night trip
Verified
10/10 Exceptional
Dec 5, 2025
Beautiful resort. Great location about midway in the keys. Staff couldn’t be more helpful.
Kevin
Kevin, 4-night trip
Verified
10/10 Exceptional
Dec 15, 2025
Enjoyed sunrise every day
Elizabeth
Elizabeth, 4-night trip
Verified
10/10 Exceptional
Feb 7, 2026
From the moment we arrived at Grassy Flats Resort, it felt like stepping into a postcard. Nestled on a gently curving stretch of white‑sand in the Keys, the property blends low‑key luxury with a breezy, coastal vibe that makes you want to linger forever. We will definitely be back and are currently looking into booking another vacation at the resort.
A shout out to every member of the Grassy Flats team as everyone seemed genuinely invested in making our stay unforgettable. Wish we could’ve stayed forever!