8.8 Fabulous Based on 585 reviews
Editor's Pick

"Kayaks and paddle boards are included for exploration in the flats. Guests stay in suites equipped with full kitchens, while others enjoy the adults-only pool. Right for active travelers, wrong for those seeking full-service hotel staffing."

From US$ 255 US$ 219 per night
Save 14%
Check-in
1 Sept 2026
Check-out
2 Sept 2026
Guests
2 guests

Adults:

2

Children:

0
  • Free cancellation
    on many rooms
  • No booking fees
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Why guests choose Grassy Flats Resort & Beach Club

  • Beachfront
    Private sand beach
  • Eco-certified
    Zero-waste bar
  • Fine dining
    The Rhum House
  • Dual pools
    Adults-only saltwater
  • Free watersports
    Kayaks & paddleboards
  • Pet welcome
    Dogs on request

Overview

The 3-star Grassy Flats Resort & Beach Club Marathon, located about a 20-minute stroll from Keys Cable Park, offers guests a cash machine and elevator. Boasting a swimming pool, this comfortable resort is nestled within a few blocks of natural attractions like Grassy Key Island.

The Marathon hotel has a convenient setting just 0.8 miles from the beachside Curry Hammock State Park. The non-smoking Grassy Flats Resort & Beach Club is stationed in the vicinity of Key Vaca. The nearby educational landmarks include Dolphin Research Center, which is merely 12 minutes by foot from the property.

There are 38 rooms comprising a balcony and a sitting area. They come with free Wi-Fi and a flat-screen TV with satellite channels, as well as such comforts as climate control. Some rooms include an additional bathroom. Along with a walk-in shower and a separate toilet, the private bathrooms also include hair dryers and towels.

With the choice of Spanish, seafood, and American cuisines in 3 different restaurants, Grassy Flats Resort & Beach Club is a perfect place for gastro enthusiasts. Food options for dinner are available at the on-site Rhum House dining restaurant, where guests will enjoy sea views. Drinks are available at the poolside bar. The bar area includes a lounge area.

  • Check-in
    from 16:00 until 21:00
  • Check-out
    from 07:00 until 11:00
  • Hotel class
    3 stars
Grassy Flats Resort & Beach Club
Our tips

Should you book Grassy Flats Resort & Beach Club?

Perfect if you
  • Want to dine on-site - The Rhum House serves dinner, and Grassy Key Land and Sea Market offers breakfast, lunch, and dinner.
  • Are bringing a pet - this resort allows pets on the property.
  • Prefer free private parking - the hotel offers complimentary on-site parking with no reservation needed.
Maybe skip if you
  • Expect a full-service spa - there is no spa on the property; the nearest is 2.8 miles away.
  • Need a restaurant open for lunch - The Rhum House serves dinner only.
Best for
  • enjoying complimentary use of kayaks and stand-up paddleboards
  • unwinding at an adults-only pool area for a peaceful escape

Facilities of Grassy Flats Resort & Beach Club

General
  • No smoking on site
  • Wi-Fi
  • Parking
  • Safe deposit box
  • Express check-in/ -out
  • Concierge desk
  • Pets allowed
  • Rooms/ Facilities for disabled
  • Wheelchair access
  • Lift
  • ATM/Cash machine
  • Coffee shop
  • Fireplace
  • Smoke detectors
  • Toilet for disabled
  • Fire extinguishers
  • Key card access
  • Key access
Dining
  • Electric kettle
  • Cookware/ Kitchen utensils
  • Restaurant
  • Poolside snack bar
Leisure & Sports
  • Saltwater pool
  • Beach umbrellas
  • Sun loungers
  • Aqua park
  • Jacuzzi
  • Wind surfing
  • Pool with view
  • Shallow end
Grassy Flats Resort & Beach Club Guest Services
  • Housekeeping
  • Welcome drink
  • Happy hour
Room Amenities
  • Air conditioning
  • Heating
  • Sitting area
  • Garden furniture
  • Tea and coffee facilities
  • Dining table
  • Free toiletries
  • Sink
  • Flat-screen TV
  • Board games
  • Parquet floor

Policies

Grassy Flats Resort & Beach Club applies these conditions to all bookings.
Check-in / Check-out
Check-in
from 16:00 until 21:00
Check-out
from 07:00 until 11:00
Important info
  • Children and extra beds
  • There are no cribs provided in a room.

Frequently asked questions

The cost of a night's stay in Grassy Flats Resort & Beach Club is $812.
Grassy Flats Resort & Beach Club provides Wi Fi throughout the property.
Key West International is the closest airport and it is situated within 60 miles from Grassy Flats Resort & Beach Club Marathon.
Popular spots near Grassy Flats Resort & Beach Club include Little Crawl Key, Curry Hammock State Park, Key Vaca, among others.
Grassy Flats Resort & Beach Club Marathon will accept Visa, Mastercard and American Express as well as other payment methods.
Grassy Flats Resort & Beach Club offers complimentary parking, an outdoor swimming pool and a picnic area.
Some rooms of Grassy Flats Resort & Beach Club Marathon welcome guests with the following facilities:
  • a sitting area
  • a work desk
  • climate control
  • TV set
  • a dining area
  • smoke detectors
  • a separate toilet
.
Pets are welcome in Grassy Flats Resort & Beach Club.
Guests of Grassy Flats Resort & Beach Club may arrive to check in at 3 PM, and check out until 11 AM.
Yes, some of the rooms at Grassy Flats Resort & Beach Club Marathon come with an workspace.
Yes, guests of Grassy Flats Resort & Beach Club can reach their rooms with an elevator.
Yes, smoking is allowed in designated smoking areas of Grassy Flats Resort & Beach Club Marathon.

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Check-in
1 Sept 2026
Check-out
2 Sept 2026
Guests
2 guests

Adults:

2

Children:

0
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