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Grassy Flats Resort & Beach Club

Photo gallery for Grassy Flats Resort & Beach Club

Balcony view
Property video
Exterior
Beach bar
Rooftop bar, ocean views, open selected days

Reviews

9.4 out of 10
Exceptional

Popular amenities

  • Pet-friendly
  • Parking included
  • Free Wi-Fi

Explore the area

View map
58182 Overseas Hwy, Marathon, FL, 33050
  • Place, Dolphin Research Center
    ‪19 min walk‬
  • Place, Curry Hammock State Park
    ‪1 min drive‬
  • Place, Crawl Key
    ‪2 min drive‬
  • Airport, Marathon, FL (MTH-Florida Keys Marathon)
    ‪10 min drive‬

Room options

View all photos for Family Suite, 2 Bedrooms

Hypo-allergenic bedding, blackout curtains, iron/ironing board

Family Suite, 2 Bedrooms

8.0 out of 10
Very good
(6 reviews)
  • Ocean view
  • 2 bedrooms
  • Sleeps 4
  • 2 Queen Beds
  • Free Wi-Fi

View all photos for Family Suite, 2 Bedrooms, Accessible

Hypo-allergenic bedding, blackout curtains, iron/ironing board

Family Suite, 2 Bedrooms, Accessible

10.0 out of 10
Exceptional
(2 reviews)
  • Garden view
  • 2 bedrooms
  • Sleeps 4
  • 2 King Beds
  • Free Wi-Fi

View all photos for Family Suite, 3 Bedrooms

Hypo-allergenic bedding, blackout curtains, iron/ironing board

Family Suite, 3 Bedrooms

10.0 out of 10
Exceptional
(1 review)
  • Ocean view
  • 3 bedrooms
  • Sleeps 6
  • 1 King Bed and 2 Queen Beds
  • Free Wi-Fi

View all photos for Standard Double Room, Ocean View - Adults Only

Standard Double Room, Ocean View - Adults Only

Standard Double Room, Ocean View - Adults Only

9.6 out of 10
Exceptional
(17 reviews)
  • Ocean view
  • 1 bedroom
  • Sleeps 2
  • 2 Queen Beds
  • Free Wi-Fi

View all photos for Standard Room, Ocean View - Adults Only

Standard Room, Ocean View - Adults Only

Standard Room, Ocean View - Adults Only

9.8 out of 10
Exceptional
(29 reviews)
  • Ocean view
  • 1 bedroom
  • Sleeps 2
  • 1 King Bed
  • Free Wi-Fi

View all photos for Luxury Room, 1 King Bed, Ocean View

Luxury Room, 1 King Bed, Ocean View

Luxury Room, 1 King Bed, Ocean View

10.0 out of 10
Exceptional
(2 reviews)
  • Ocean view
  • 1 bedroom
  • Sleeps 2
  • 1 King Bed
  • Free Wi-Fi

View all photos for Deluxe Room, 1 King Bed, Oceanfront

Deluxe Room, 1 King Bed, Oceanfront

Deluxe Room, 1 King Bed, Oceanfront

9.6 out of 10
Exceptional
(4 reviews)
  • Ocean view
  • 1 bedroom
  • Sleeps 2
  • 1 King Bed
  • Free Wi-Fi

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About the area

Marathon

With a stay at Grassy Flats Resort & Beach Club in Marathon, you'll be by the ocean, just steps from Coco Plum Beach and a 2-minute drive from Curry Hammock State Park. .This hotel is 10 mi (16 km) from The Turtle Hospital.

What's nearby

  • Dolphin Research Center - 19 min walk - 1.7 km
  • Curry Hammock State Park - 1 min drive - 1.7 km
  • Keys Cable Park - 1 min drive - 2.4 km
  • Crawl Key - 2 min drive - 2.3 km
  • Coco Plum Beach - 10 min drive - 11.2 km

Getting around

  • 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 offers 38 accommodations, which are accessible via exterior corridors and feature hair dryers and irons/ironing boards. Rooms open to furnished balconies or patios. 43-inch flat-screen televisions come with premium cable channels.

Guests can surf the web using the complimentary wireless Internet access. Additionally, rooms include complimentary toiletries and blackout drapes/curtains. Hypo-allergenic bedding, change of towels, and change of bedsheets can be requested. Housekeeping is provided daily.

2 outdoor swimming pools are on site along with a hot tub. Other recreational amenities include a sauna.

The recreational activities listed below are available either on site or nearby; fees may apply.

Stay in one of 38 guestrooms featuring flat-screen televisions. Rooms have private furnished balconies or patios. Complimentary wireless internet access keeps you connected, and cable programming is available for your entertainment. Bathrooms have complimentary toiletries and hair dryers.
Dip into one of the 2 outdoor pools or enjoy other recreational amenities including a sauna and bicycles to rent. Additional amenities at this hotel include complimentary wireless internet access, concierge services, and charcoal grills.
Satisfy your appetite with local and international cuisine at The Rhum House, a steakhouse which features a bar/lounge and an ocean view. Wrap up your day with a drink at the poolside bar. Cooked-to-order breakfasts are available daily from 6:00 AM to 11:00 AM for a fee.
Featured amenities include multilingual staff, ATM/banking services, and an elevator. Free self parking is available onsite.
Cooked-to-order breakfasts are available for a surcharge and are served each morning between 6:00 AM and 11:00 AM.
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.

Property amenities

Internet

  • Available in all rooms: Free WiFi
  • Available in some public areas: Free WiFi

Parking and transport

  • Electric car charging station on site
  • Free self parking on site
  • Limited on-site self parking
  • Wheelchair-accessible parking and van parking available

Food and drink

  • Daily cooked-to-order breakfast available 6:00 AM to 11:00 AM for a fee: USD 5 to 30 per person
  • A bar/lounge
  • A poolside bar
  • A restaurant

Restaurants on site

  • Grassy Key Market
  • The Palm Deck
  • The Rhum House

Things to do

  • 2 outdoor pools
  • Bicycle rentals
  • Bicycle storage
  • Books
  • Canoeing
  • Fishing
  • Hot tub
  • Kayaking
  • Paddleboard
  • Sailing
  • Sauna
  • Water sports equipment
  • Windsurfing

Family friendly

  • 2 outdoor pools
  • Children's games
  • Pool gate

Conveniences

  • ATM
  • Limited-hour front desk
  • Water dispenser

Guest services

  • Change of bedsheets (on request)
  • Change of towels on request
  • Concierge services
  • Housekeeping (daily)
  • Multilingual staff
  • Proposal/romance packages

Outdoors

  • Barbecue grill
  • Beach loungers
  • Beach towels
  • Beach umbrellas
  • Dock
  • Firepit
  • Outdoor furniture
  • Pool loungers
  • Pool umbrellas

Accessibility

  • If you have requests for specific accessibility needs, please contact the property using the information on the reservation confirmation received after booking.
  • 2 accessible parking spaces
  • Lift (91 centimetre wide door)
  • Pool hoist on site
  • Stair-free path to entrance
  • Visual alarms in hallways
  • Well-lit path to entrance
  • Wheelchair accessible (may have limitations)
  • Wheelchair-accessible parking
  • Wheelchair-accessible path of travel
  • Wheelchair-accessible path to lift
  • Wheelchair-accessible pool
  • Wheelchair-accessible public bathroom
  • Wheelchair-accessible restaurant
  • Wheelchair-accessible van parking

More

  • 3 buildings
  • 3 floors
  • At least 80% lighting from LEDs
  • At least 80% of food locally-sourced
  • At least 80% organic food
  • Biodegradable coffee stirrers available
  • Biodegradable drinking straws available
  • Comprehensive food waste policy
  • Comprehensive recycling policy
  • Eco-friendly cleaning products used
  • Local artist showcase
  • No plastic coffee stirrers
  • No plastic drinking straws
  • No plastic soft drink bottles
  • No plastic water bottles
  • Renovated entire property - March 2022
  • Reusable cups
  • Reusable tableware
  • Smoke-free property
  • Vegan dining options
  • Vegetarian breakfast available
  • Vegetarian dining options
  • Water dispenser usage encouraged

Room amenities

Bedroom

  • Bedsheets provided
  • Blackout drapes
  • Hypo-allergenic bedding

Bathroom

  • Free toiletries
  • Hair dryer
  • Shampoo
  • Soap
  • Toilet paper
  • Towels provided

Entertainment

  • 43-inch flat-screen TV with premium cable channels

More

  • Access via exterior corridors
  • Air conditioning (climate-controlled)
  • Bulk dispensers for toiletries
  • Cleaning products are eco-friendly
  • Eco-friendly toiletries
  • Electrical adapters
  • Energy-saving switches in guestrooms
  • Iron/ironing board
  • LED lighting
  • Recycling
  • Water-efficient showers
  • Water-efficient toilets

Policies

Check-in

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

Check-out before 11:00 AM

Late check-out subject to availability

A late check-out fee will be charged

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

Renovations and closures

The following facilities will be closed during the summer:
  • Bar/Lounge

Access methods

Front desk (limited hours)

Pets

Pets allowed for an extra charge of USD 50 per accommodation, per night

Service animals are welcome, and are exempt from fees

Welcoming dogs only

Up to 30 lbs per pet

Pets cannot be left unattended

Specific rooms only; pet-friendly rooms can be requested by contacting the property at the number on the booking confirmation

Children and extra beds

Children are welcome

Rollaway/extra beds are not available

Cribs (infant beds) are not available

Payment types

Important information

Fees

You'll be asked to pay the following charges at the property. Fees may include applicable taxes:

  • Resort fee: USD 48 per accommodation, per night
The resort fee includes:
  • 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
  • Hot tub access

We have included all charges provided to us by the property.

Optional extras

  • Fee for cooked-to-order breakfast: approximately USD 5 to 30 per person
  • Pet fee: USD 50 per accommodation, per night
  • Service animals are exempt from fees
  • Late check-out is available for a fee (subject to availability)

The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.

You need to know

Extra-person charges may apply and vary depending on property policy
Government-issued photo identification and a credit card, debit card, or cash deposit may be required at check-in for incidental charges
Special requests are subject to availability upon check-in and may incur additional charges; special requests cannot be guaranteed
The name on the credit card used at check-in to pay for incidentals must be the primary name on the guestroom reservation
Guests must contact this property in advance to reserve cribs/infant beds
This property accepts credit cards, debit cards, and cash
Cashless transactions are available
This property uses eco-friendly cleaning products
Safety features at this property include a carbon monoxide detector, a fire extinguisher, a smoke detector, and a first aid kit
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

We should mention

Pool access available from 7:00 AM to 10:00 PM
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
This property welcomes guests of all sexual orientations and gender identities (LGBTQ+ friendly)

Property is 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

Grassy Flats Resort & Beach Club Reviews

Reviews

9.4

Exceptional

Rating 10 - Excellent. 351 out of 442 reviews
Rating 8 - Good. 57 out of 442 reviews
Rating 6 - Okay. 25 out of 442 reviews
Rating 4 - Poor. 5 out of 442 reviews
Rating 2 - Terrible. 4 out of 442 reviews

9.8/10

Cleanliness

9.6/10

Staff & service

9.0/10

Amenities

9.4/10

Property conditions & facilities

Reviews

10/10 Excellent

Howard

Travelled with partner
Liked: Cleanliness, amenities, property conditions & facilities
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.
Stayed 4 nights in Feb 2026

10/10 Excellent

Lisa J.

Travelled with partner
Liked: Cleanliness, amenities, property conditions & facilities
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!
Stayed 3 nights in Feb 2026

10/10 Excellent

Lance

Liked: Cleanliness, staff & service, amenities
Staff was very friendly and helpful. Nice room at a beautiful location. Really enjoyed the beach and pools.
Stayed 4 nights in Feb 2026

8/10 Good

Kevin, Natick

Travelled with partner
Liked: Cleanliness, property conditions & facilities
Rooms were clean but the staff were nice and helpful. Both their restaurants were closed the whole time.
Stayed 4 nights in Feb 2026

8/10 Good

Stuart

Fabulous location with amazing views. Shout out to Mia in reception, very helpful and friendly.
Stayed 6 nights in Jan 2026

10/10 Excellent

Carlos

Travelled with partner
Liked: Cleanliness, amenities, property conditions & facilities
Exceptional services.
Stayed 2 nights in Jan 2026

10/10 Excellent

Joseph

Travelled with partner
Liked: Cleanliness, amenities, property conditions & facilities
Clean, beautiful room with great view. Several good food and drink options. Great location on the water.
Stayed 7 nights in Jan 2026

10/10 Excellent

Jeffery Scott

Liked: Cleanliness, amenities, property conditions & facilities
Great place!
Stayed 5 nights in Jan 2026

8/10 Good

Jeanne

Liked: Cleanliness, staff & service, amenities
The resort is beautiful. Restaurant and bar onsite. Only 4 out of 5 stars because housekeeping was a bit lacking. Had to request tge bed be made up one day. Not all towels were changed & glasses not changed daily. Sort of disappointing for the price point.
Stayed 3 nights in Jan 2026

10/10 Excellent

Philip

Stayed 2 nights in Jan 2026

10/10 Excellent

Melanie

Travelled with group
Liked: Cleanliness, amenities, property conditions & facilities
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.
Stayed 3 nights in Dec 2025

10/10 Excellent

Karen

Stayed 2 nights in Jan 2026

10/10 Excellent

Leann

Travelled with partner
Liked: Cleanliness, amenities, property conditions & facilities
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!
Stayed 7 nights in Jan 2026

10/10 Excellent

PATRICIA

Stayed 2 nights in Jan 2026

8/10 Good

Debbie

Travelled with family
Liked: Cleanliness, amenities, property conditions & facilities
Staff was very kind. Room was clean beautiful views
Stayed 3 nights in Jan 2026

10/10 Excellent

mariya

Stayed 3 nights in Jan 2026

10/10 Excellent

John

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
We did not have breakfast there.
Stayed 2 nights in Jan 2026

10/10 Excellent

Mindy

Travelled with family
Liked: Cleanliness, amenities, property conditions & facilities
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!
Stayed 7 nights in Jan 2026

10/10 Excellent

Lisa

Liked: Cleanliness
This was out first stay at Grassy Flats Resort and Beach Club and wow!!! First, I would like to comment on how the staff goes out of their way to make sure you are well cared for. Everyone is so kind. And I have to say the bed (in room 208) had without a doubt, the most comfortable mattress we've ever slept on. It felt like we were sleeping on a cloud. Just incredible!!! The property is very clean and they keep the grounds nicely manicured. And last but mot least, Wilma, the resort princess...what a pretty kitty. Thank you Grassy Flats. We hope to return sooner than later.
Stayed 4 nights in Jan 2026

10/10 Excellent

Michael

Travelled with partner
Liked: Cleanliness, amenities, property conditions & facilities
Beautiful room and grounds. Everything was clean and well cared for. Staff was friendly and attentive. The views were glorious!
Stayed 3 nights in Jan 2026

10/10 Excellent

Andrea

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Breakfast was great
Stayed 3 nights in Dec 2025

10/10 Excellent

Glenn

Travelled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Clean, quiet and serene resort. If you're looking to relax and chill out completely then this is the place. The staff were all super nice and helpful. Absolutely gorgeous sunrise view. The property all around is beautiful. Our room was perfect and the views from the balcony were stunning! The food and drinks were excellent and the pool and hot tub were clean and relaxing. The store on the property was very well stocked and could cook up whatever you bought from them. Would highly recommend Grassy Flats resort.
Stayed 4 nights in Jan 2026

10/10 Excellent

Janelle

Travelled with group
Liked: Cleanliness, staff & service, amenities
Room was beautiful and property was stunning!
Stayed 4 nights in Dec 2025

10/10 Excellent

Clayton

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 3 nights in Jan 2026

10/10 Excellent

Yelena

Liked: Cleanliness, amenities, property conditions & facilities
Beautiful resort, felt like a deserted island. Perfect to set! Staff was very friendly and helpful. Really enjoyed our quick getaway!!
Stayed 4 nights in Jan 2026