"Beautiful views from our balcony, the rooftop breakfast patio, and pool Tiki bar."
Janice from United States
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Eco-friendly boutique resort with beachfront access on Grassy Key
Amenities
Grassy Flats Resort & Beach Club offers complimentary kayaks and paddleboards for all guests. The property has two salt-water swimming pools, one reserved for adults only, plus a hot tub and sauna. Guests have free use of bicycles and access to windsurfing equipment on site.
Rooms
Accommodations include one-bedroom studios, two-bedroom suites, and three-bedroom suites with ocean views and private balconies. Each room has a private entrance, air conditioning, and a private bathroom with a claw-foot freestanding bathtub in select suites. The three-bedroom suites include a full kitchen with stainless steel appliances and granite countertops.
Dining
The Rhum House restaurant serves American, Mediterranean, Seafood, Spanish, and local cuisines for breakfast, lunch, and dinner. The Land and Sea Market offers fresh local meats, seafood, wine, and a coffee shop open from 6am. A rooftop bar with live music serves craft cocktails and small plates Thursday through Sunday.
Entertainment
An Artists in Residency program promotes local artistry with onsite art studios located at the adjacent Keys Cable Park. The property has live music on the deck during sunset and a rooftop bar with a full ocean view. Board games and puzzles are available for guest use throughout the resort.
Family & Pet-Friendly
Children have access to a family pool, a shallow end with sun loungers, and a blow-up water obstacle course at the cable park lagoon. Dogs are welcome with nearby beach access, and the property provides pet-friendly accommodations. Family rooms with multiple bedrooms accommodate groups of up to six guests.
Highlights
Sustainable practices: Elimination of single-use plastics and herbicides
Water sports: Complimentary kayaks, paddleboards, windsurfing
Dining: Rhum House fine dining and Land and Sea Market
Pools: Adult-only saltwater pool and family pool with pool bar
Entertainment: Rooftop bar with live music, Artists in Residency program
Pet policy: Dogs welcome with beach access
“This eco-conscious resort in Marathon appeals to families seeking both relaxation and connection to nature. I'm particularly drawn to the sustainable ethos and the focus on local artistry. Its waterfront location and complimentary water sports add a layer of active fun, while the varied dining options cater to different tastes.”
James DavidEditor-in-Chief at Dogfriendly-hotels
Select your room type
The hotel provides many room choices—family rooms, doubles, and pet-friendly suites—with breakfast, free cancellation, and special offers
Humidor House King Suite Adults Only
2 persons
42 m²
1 King-size bed
Air conditioning
Balcony
room details
Wreckers House Galleon King Suite Adults Only
2 persons
46 m²
1 King-size bed
Air conditioning
Balcony
room details
Standard Double Room Adults Only
2 persons
46 m²
2 King Size Beds
Air conditioning
Balcony
room details
Show all rooms
Rates & availability calendar
See current prices and availability for your chosen dates!
September 2026 - September 2027
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Check-in/ Check-out
Facilities
Hotels feature amenities designed to keep both you and your pet comfortable
Facilities: Great
8.9/10Review score
General
No smoking on site
Wi-Fi
Free 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
Fire extinguishers
Key card access
Key access
Sports & Fitness
Wind surfing
Guest Parking
Electric kettle
Cookware/ Kitchen utensils
Services
Housekeeping
Welcome drink
Happy hour
Dining
Restaurant
Poolside snack bar
Children
Board games
Facilities for people with disabilities
Toilet for disabled
Spa & Leisure
Saltwater pool
Beach umbrellas
Sun loungers
Aqua park
Jacuzzi
Pool with view
Shallow end
Room features
Air conditioning
Heating
Sitting area
Garden furniture
Tea and coffee facilities
Dining table
Bathroom
Free toiletries
Sink
Self-catering
Electric kettle
Cookware/ Kitchen utensils
Media
Flat-screen TV
Room decor
Parquet floor
Show more
Dining Onsite
Grassy Flats Resort & Beach Club features delightful onsite dining options that celebrate local flavors and vibrant culinary experiences. With a focus on fresh ingredients and inviting atmospheres, guests can savor exquisite dishes as they unwind in this tropical paradise.
The Rhum House - fine dining
Fine dining with a Caribbean twist
Ambiance
An elegant yet relaxed setting, perfect for a cozy dinner by candlelight.
Key Offerings
Guests can indulge in a curated menu showcases seasonal ingredients, with each dish prepared with care by this family-owned eatery. Ideal for intimate dinners or special occasions.
Reservation
Recommended
Open for dinner from 5:00 PM to 9:00 PM, seven days a week.
Barrel & Bale
Creative cocktails and bar bites
Ambiance
Casual and inviting, with a commitment to sustainability in a laid-back environment.
Key Offerings
This bar aims to be the only zero-waste establishment in the Keys, serving craft cocktails and light bites that reflect eco-conscious practices.
Reservation
Not needed
Hours vary; typically open for evening service.
Herbie's
Casual dining with quick bites
Ambiance
A friendly spot to unwind, featuring a laid-back atmosphere perfect for a casual meal.
Key Offerings
Renowned for its delicious brews and crispy fries, Herbie's offers a relaxed dining experience ideal for families and groups.
Reservation
Not needed
Hours vary; typically open for casual lunch and dinner.
Bongo's
Tropical-inspired casual fare
Ambiance
Nestled within lush tropical fruit trees and herb gardens, Bongo's offers a serene escape.
Key Offerings
Savor a variety of dishes with a focus on fresh herbs and fruits from the surrounding gardens, creating a unique dining experience that connects guests to the local landscape.