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Grassy Flats Resort & Beach Club

4.0 star property

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

Reviews

9.4 out of 10
Exceptional

Popular amenities

  • Pet friendly
  • Parking included
  • Free WiFi
$485
$431 nightly
$485 total
Total with taxes and fees
Mar 8 - Mar 9

Explore the area

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

Room options

View all photos for Family Suite, 2 Bedrooms

Hypo-allergenic bedding, blackout drapes, iron/ironing board, free WiFi

Family Suite, 2 Bedrooms

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

View all photos for Family Suite, 2 Bedrooms, Accessible

Hypo-allergenic bedding, blackout drapes, iron/ironing board, free WiFi

Family Suite, 2 Bedrooms, Accessible

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

View all photos for Family Suite, 3 Bedrooms

Hypo-allergenic bedding, blackout drapes, iron/ironing board, free WiFi

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

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

Standard Double Room, Ocean View - Adults Only | Hypo-allergenic bedding, blackout drapes, iron/ironing board, free WiFi

Standard Double Room, Ocean View - Adults Only

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

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

Standard Room, Ocean View - Adults Only | Hypo-allergenic bedding, blackout drapes, iron/ironing board, free WiFi

Standard Room, Ocean View - Adults Only

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

View all photos for Luxury Room, 1 King Bed, Ocean View - Adults Only

Luxury Room, 1 King Bed, Ocean View - Adults Only | Hypo-allergenic bedding, blackout drapes, iron/ironing board, free WiFi

Luxury Room, 1 King Bed, Ocean View - Adults Only

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

View all photos for Deluxe Room, 1 King Bed, Oceanfront - Adults Only

Deluxe Room, 1 King Bed, Oceanfront - Adults Only | Hypo-allergenic bedding, blackout drapes, iron/ironing board, free WiFi

Deluxe Room, 1 King Bed, Oceanfront - Adults Only

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

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About the neighborhood

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 - 17 min walk - 0.9 miles
  • Crawl Key - 2 min drive - 1.5 miles
  • Curry Hammock State Park - 2 min drive - 0.9 miles
  • Keys Cable Park - 4 min drive - 1.5 miles
  • Coco Plum Beach - 11 min drive - 6.6 miles

Getting around

  • Marathon, FL (MTH-Florida Keys Marathon) - 9 min drive

Restaurants

  • ‪Circle K - ‬7 min drive
  • ‪The Island Fish Company - ‬6 min drive
  • ‪Circle K - ‬6 min drive
  • ‪Sparky's Landing Fish and Cocktails - ‬6 min drive
  • ‪Georgie’s Coffee - ‬1 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 transportation

  • Electric car charging station on site
  • Free self parking on site
  • 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
  • Elevator (36 inch 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 elevator
  • Wheelchair-accessible pool
  • Wheelchair-accessible public washroom
  • 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
  • Smoking not allowed
  • 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

Property 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. 323 out of 409 reviews
Rating 8 - Good. 53 out of 409 reviews
Rating 6 - Okay. 24 out of 409 reviews
Rating 4 - Poor. 5 out of 409 reviews
Rating 2 - Terrible. 4 out of 409 reviews

9.8/10

Cleanliness

9.6/10

Staff & service

9.0/10

Amenities

9.4/10

Property conditions & facilities

Reviews

10/10 Excellent

Dorothy

Liked: Cleanliness, amenities, property conditions & facilities
Amazing stay, perfect small hotel with lot of activities
Stayed 1 night in Oct 2025

8/10 Good

William

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Everyone was super friendly and helpful. We asked where we could access a microwave and they brought one to the room! Also came super fast to assist with coffee brewer. Only downside was the mattress was way too soft.
Stayed 2 nights in Nov 2025

10/10 Excellent

Jennifer

Traveled with group
Liked: Cleanliness, amenities
The pool is a garden paradise. The palm deck rooftop has amazing views. The staff all say the owner Matt is amazing and all the staff were overly gracious. Dinner was also amazing with a great bartender who asked us how things were. Water sports were an added bonus
Stayed 4 nights in Nov 2025

10/10 Excellent

Dannyse

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 2 nights in Nov 2025

8/10 Good

James

Traveled with family
Liked: Cleanliness, staff & service, amenities
The Family Suite rooms (located in Conch House) require serious updating, especially the bathrooms, which bring you back to the 1970s Keys. The restaurants, bars, and on-site market are phenomenal; it feels like you are staying in two completely different resorts 40 years apart. The staff and overall service were also fantastic. Very friendly staff throughout the site. I would go back and stay in the updated luxury rooms without hesitation. A luxury room stay here would deserve 5 Stars. Cheers
Stayed 4 nights in Nov 2025

8/10 Good

Ryan

Traveled with family
Liked: Cleanliness, staff & service, property conditions & facilities
Disliked: Amenities
This property is miles from anything. I had no rental car and had I not had family who had one I would have needed to take at least a $10 Uber to get to the nearest facility to the property, and much more to get into Marathon. Maybe it was because it was the offseason but the bar on the second floor was closed for several days during the week. It also closed way too early when it was open. The bartenders were friendly when the bars were open, but the drinks weren't well-mixed. Access to the water was limited (for my personal preference) due to the condition of the beach area. It's not the property's fault, but the area near the water is not something I wanted to participate in, even for free kayaking or paddle boarding. The "beach" had no sand and was tough on bare feet, and the area in/near the water was sludgy and gross looking. The breakfast options were very limited at the on-site store and I ended up getting a box of cereal from a local grocery store one of the times I was in Marathon. The room was nice and the staff was great, but I wouldn't stay here again.
Stayed 6 nights in Nov 2025

10/10 Excellent

KATHERINE

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
The staff is excellent! From check in with Connie to the cleaning staff and restaurant/bar servers. We especially enjoyed the Sunday regae entertainer.
Stayed 2 nights in Nov 2025

10/10 Excellent

Jose A

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Great place. They have an area for families and another separate one for Adult's. Conplementary drink on the tour for the first time. Super clean and comfortable. Snack bar and beverage in the room. We got the suite for extra cost but was a neat idea.
Stayed 2 nights in Nov 2025

8/10 Good

Emma

Traveled with partner
Liked: Cleanliness, amenities, property conditions & facilities
My expectations for Grassy Flats was so high. It is a beautiful setting and the rooms are wonderful with excellent service from all staff . I would have rated excellent had it been for a few details . I was unaware when I booked months back that the rooftop bar and Rhum House Restaurant would only open from Thursday to Sunday . We arrived Tuesday and left Friday. So we ate at the Land and sea Market on our 1st evening - laid back, tasty food. The resort came to life on Thursday and both the bar and restaurant were perfect venues to enjoy the setting , such a shame we only had one night to experience this. The food at The Rhum House restaurant was simply outstanding, with our server Max who was one of the best , her knowledge of the food was spot on and she really looked after us . Great decor and ambience too. The other reasons for not an excellent rating are purely my own opinions . I found the rooms had little soundproofing, so as a light sleeper I was woken a lot and I struggled with the noise of the fridge next to the bed . However, the suite with the claw set freestanding bath was very luxurious with a lovely sea view . Just a little note to the resort - there was nowhere in the bathroom to store all toiletries etc. a small table or shelf would have been great . Jeff at the poolside bar was a great asset always cheery and accommodating with cocktails and ice . We loved the pedal kayak for 2 a great way to explore the bay . Thank you to all at Grassy Flats .
Wilma the resident cat x
Stayed 3 nights in Nov 2025

8/10 Good

Joanne

Stayed 2 nights in Nov 2025

10/10 Excellent

Paul

Traveled with partner
Liked: Cleanliness, amenities, property conditions & facilities
The staff was very helpful and friendly. The room was excellent and the property was very nice.
Stayed 4 nights in Nov 2025

10/10 Excellent

antonio

Stayed 2 nights in Nov 2025

10/10 Excellent

David, Syracuse

Traveled with family
Liked: Cleanliness, property conditions & facilities
Great staff, check in, site tour and dinner in the restaurant.
Stayed 1 night in Nov 2025

10/10 Excellent

Paul

Traveled with partner
Liked: Cleanliness, amenities, property conditions & facilities
Beautiful location, very nice room, amenities galore, extremely accommodating staff.
Stayed 1 night in Nov 2025

10/10 Excellent

Thomas

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 1 night in Nov 2025

10/10 Excellent

Susan

Traveled with family
Liked: Cleanliness, staff & service, amenities
Beautiful resort with wonderful, friendly, accommodating staff. Food was outstanding with strong focus on fresh, local and organic choices. Definitely a great find!
Sunrise at the beach
From our balcony
Stayed 3 nights in Nov 2025

10/10 Excellent

carolyn

Traveled with family
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Beautiful!! Gorgeous at night!
Stayed 1 night in Oct 2025

8/10 Good

Carmen

Liked: Cleanliness, property conditions & facilities
Room was clean with a great view. However wish there were more towels available for pool and tub. Only one towel was in room but could not get another when they were wet. Also for the price no complimentary breakfast was surprising. Outdoor bar was nice and good service and food.
Stayed 1 night in Nov 2025

10/10 Excellent

Katie

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
This charming little place is absolutely amazing! Room was unique, very spacious and comfortable. Our flight got in late, and the office was closing, so they came up with a great easy way to check in and rest before they opened again. On that note, the staff is extremely nice, very helpful and friendly from check in to check out. The grounds are gorgeous, they even have a little restaurant/bar with a great view, unfortunately it was closed for updates during our 3 day stay. The pool/hot tub was very clean and enjoyable, right there by the water which was so peaceful to us. There are some great activities, like kiteboarding, kayaks, etc- but I will warn y'all they do cost $$, but they seem worth it. Our only gripe was a slow elevator, but the stairs are not that bad. We will absolutely return when we are in Marathon for a family trip.
Stayed 3 nights in Oct 2025

10/10 Excellent

Donald

Traveled with partner, Traveled with pets
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Excellent pet friendly property on the water! The staff were more than excellent! We thoroughly enjoyed our quick getaway and will definitely come back to this beautiful resort!
Stayed 1 night in Oct 2025

10/10 Excellent

Chas

Stayed 2 nights in Oct 2025

10/10 Excellent

Kenneth

Stayed 1 night in Oct 2025

8/10 Good

Brian

Stayed 1 night in Oct 2025

10/10 Excellent

Angel

Stayed 2 nights in Oct 2025

10/10 Excellent

Mark

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
The staff was WONDERFUL! Receptive, responsive and so happy! They make your stay so special, everyone makes you feel like you are the only guest there! The bartender Jeff makes the BEST drinks, Lizzy and the office staff are all excellent. They know everything in the area that’s fun to do and the restaurants that serve the very best food. Audrey, Jasmine and the rest of the staff in the “Land & Sea Market” on the property was off the charts, 10/10 for awesome service and friendliness, and the food was consistently delicious and plentiful! The chefs were top notch. They make whatever you like and amend the dish as necessary. We wanted to eat every single meal there every day, but we knew we couldn’t because we had to experience other food while we were on our vacation. Grassy Flats has another location down the street 5 minutes away called Bongos, which is so much fun! It’s not a hotel, it’s a fun/party place with water sports and multiple bars, music, and once again, excellent food and bartenders! Jasmin was covering the bar the night we visited Bongos and her drinks are amazing! She is awesome, too! So friendly, so fun, and made us want to go to this fun party place every day! The one and only negative I would mention is that our room needed a little “TLC”. It was VERY CLEAN, which is the most important thing and all we care about. But, I do think it probably needs a couple of pieces of furniture that is in better shape but other than that, our experience was OUTSTANDING!
Stayed 7 nights in Oct 2025