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Welcome to Grassy Flats

If you're looking for sunny, adventure-filled days, and warm, breezy evenings sipping cocktails oceanside, you've found your perfect vacation spot in the Florida Keys.

Unplug and unwind at Grassy Flats, a family-owned, eco-friendly boutique resort located on Grassy Key. We are focused on sustainable hospitality, action water sports, and providing personalized services and unforgettable stays. 

With a blend of modern amenities and historical charm, Grassy Flats offers a unique "olde Florida" experience.

eFoiling in the Florida Keys

World Class Watersports

Kiteboarding. Paddleboarding. eFoiling. Sailing. We've got something for everyone to get out on the water, and after a day of adventure you can feel good about indulging in a cocktail or two.

Oceanfront balcony view overlooking the ocean and a swimming pool at a hotel in Marathon, Florida.

Oceanfront Pools

One pool for the whole family, one pool and hot tub just for the adults. Whether your poolside vibe is socializing or solitude, the choice is all yours.

Bunch of bananas hanging in a botanical organic garden in the Florida Keys.

Sustainable Practices

We're dedicated to operating with the environment in mind so our slice of paradise is here for generations to come.

Rose petals on the bed for a luxury hotel in Marathon, Florida.

In-Room Packages

Whether you're looking to add a touch of indulgence or celebrate a special occasion, we have a variety of options to choose from. With our in-room packages, you'll be greeted with the luxury you deserve from the moment you arrive.

Sunny beach view with a lounge chair and umbrella at Grassy Flats hotel in Marathon, Florida.

Beach Club & Day Passes

Get the best of Grassy Flats with a daily or annual Beach Club Membership. With resort and cabana access, free events, and more, it's the perfect way for locals and frequent visitors to enjoy everything Grassy Flats has to offer.

Full Moon Party at Grassy Flats hotel the Florida Keys.

Events

Discover what’s happening at Grassy Flats, from exclusive full moon soirées to sunny poolside parties. Click below to view our event calendar and join us for an experience to remember.

Slice of Paradise in the Keys

"We love the rooms and the views are breathtaking. It’s very peaceful there. The staff is incredibly friendly and helpful."

Julie S.

Best Resort in the Florida Keys

We were taken away by its beauty and the extremely friendly and welcoming staff! I have stayed in many resorts in the Florida Keys and this is hands down my favorite! They have everything you need! The rooms are absolutely breathtaking and spacious! Highly, highly recommend!

Erika W.

Best Place in Marathon!

I’ve been coming to Marathon for 17 years and there is no better place to stay. The staff is attentive, the pools (one adults only and one family) are both wonderful. The open air bar with live music at happy hour is delightful. This is my 4th stay!

Dori F.

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