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Choose from 2338 Grassy Key Hotel Deals

Rainbow Bend Resort

Rainbow Bend Resort

2.5 out of 5
57784 Overseas Hwy Marathon FL
  • 22 min walk from Dolphin Research Center
Book a stay at this beach hotel in Marathon. Enjoy a private beach, daily housekeeping, and a garden. Our guests praise the breakfast and the helpful staff in ...
8.2/10 Very Good! (958 reviews)
Everything was amazing

Reviewed on May 15, 2026

Rainbow Bend Resort
Grassy Flats Resort & Beach Club

Grassy Flats Resort & Beach Club

4 out of 5
58182 Overseas Hwy Marathon FL
  • 14 min walk from Dolphin Research Center
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and 2 outdoor pools. Our guests praise the helpful staff and the property condition in our reviews. ...
9.4/10 Exceptional! (442 reviews)
The room was outstanding. The view was absolutely gorgeous. We were on the same floor as the entertainment/bar, but the noise was minimal and stopped at a reasonable hour. Parking was convenient too. The staff on the front desk were always kind. The house cat, Wilma, is awesome. If there was any ...

Reviewed on May 7, 2026

Grassy Flats Resort & Beach Club
Gulf View Waterfront Resort

Gulf View Waterfront Resort

2.5 out of 5
58743 OVERSEAS HWY Marathon FL
  • 4 min walk from Dolphin Research Center
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and daily housekeeping. Our guests praise the helpful staff and the clean rooms in our reviews. ...
8.4/10 Very Good! (571 reviews)
Me gusto mucho! Pasamos sólo una noche pero todo estaba súper limpio y muy acogedor!

Reviewed on May 10, 2026

Gulf View Waterfront Resort
Hawks Cay Resort

Hawks Cay Resort

4 out of 5
61 Hawks Cay Blvd Marathon FL
  • 6 min drive from Dolphin Research Center
Book a stay at this luxury hotel in Marathon. Enjoy free WiFi, 3 outdoor pools, and a full-service spa. Our guests praise the pool and the helpful staff in our ...
8.2/10 Very Good! (1,002 reviews)
Love this place

Reviewed on May 14, 2026

Hawks Cay Resort
Isla Bella Beach Resort & Spa

Isla Bella Beach Resort & Spa

5 out of 5
1 Knights Key Boulevard Marathon FL
  • 29 min drive from Dolphin Research Center
Book a stay at this luxury hotel in Marathon. Enjoy free WiFi, 5 outdoor pools, and a full-service spa. Our guests praise the pool and the helpful staff in our ...
9.2/10 Wonderful! (1,146 reviews)
Everything is wonderful at Isla Bella!

Reviewed on May 16, 2026

Isla Bella Beach Resort & Spa
Lime Tree Bay Resort

Lime Tree Bay Resort

3.5 out of 5
68500 Overseas Hwy Long Key FL
  • 23 min drive from Dolphin Research Center
Book a stay at this beach resort in Long Key. Enjoy free WiFi, free parking, and 3 outdoor pools. Our guests praise the pool and the helpful staff in our reviews. ...
9.2/10 Wonderful! (1,289 reviews)
Location is great the only issue was a very small beach area.

Reviewed on May 16, 2026

Lime Tree Bay Resort
Fairfield Inn & Suites by Marriott Marathon Florida Keys

Fairfield Inn & Suites by Marriott Marathon Florida Keys

3 out of 5
13201 Overseas Hwy Marathon FL
  • 13 min drive from Dolphin Research Center
Book a stay at this business-friendly hotel in Marathon. Enjoy free breakfast, free WiFi, and 2 outdoor pools. Our guests praise the breakfast and the restaurant ...
9.2/10 Wonderful! (1,132 reviews)
Staff was excellent and the facility was clean. However we were surprised to learn of an additional $20 per day to park our vehicle in their lot. You don’t get a parking spot included with your room fee.

Reviewed on May 15, 2026

Fairfield Inn & Suites by Marriott Marathon Florida Keys
Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys

Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys

3 out of 5
2146 Overseas Hwy Marathon FL
  • 26 min drive from Dolphin Research Center
Book a stay at this beach hotel in Marathon. Enjoy free WiFi, 2 outdoor pools, and a beach locale. Our guests praise the pool and the helpful staff in our reviews. ...
9/10 Wonderful! (1,002 reviews)
The air conditioning was awful!! LOUD. the vent was next to the bed so every time it cut in it woke us up. Also there was something in the vent that was rattling. Worst sleep ever.

Reviewed on May 14, 2026

Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys
Kingsail Resort

Kingsail Resort

2 out of 5
7050 Overseas Highway Marathon FL
  • 20 min drive from Dolphin Research Center
Stay at this motel in Marathon. Enjoy free WiFi, free parking, and a marina. Our guests praise the helpful staff and the clean rooms in our reviews. Popular ...
8.6/10 Excellent! (1,064 reviews)
I stayed here last year and was looking forward to staying here again. After a 6 hour drive I was hoping to jump in the pool where I spend a lot of my time. They were closed for maintenance. They needed to shock the pool. I asked when I left today how long they have known about this and how long ...

Reviewed on May 15, 2026

Kingsail Resort
Banana Bay Resort & Marina

Banana Bay Resort & Marina

3 out of 5
4590 Overseas Highway Marathon FL
  • 23 min drive from Dolphin Research Center
Book a stay at this golf hotel in Marathon. Enjoy free breakfast, a marina, and free bicycles on site. Our guests praise the pool and the helpful staff in our ...
7.6/10 Good! (1,022 reviews)
the room were well made but not clean it was dusty in the room and he drawers to the dresser were broken . the towels are very small not at all adult size pleasing. the bathrooms only have one glass door and by the time your done showering your bathroom floor is flooded as well. also keep in mind ...

Reviewed on May 15, 2026

Banana Bay Resort & Marina
Coconut Cay Resort & Marina

Coconut Cay Resort & Marina

3 out of 5
7196 Overseas Highway Marathon FL
  • 20 min drive from Dolphin Research Center
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and a marina. Our guests praise the helpful staff and the clean rooms in our reviews. Popular ...
8.4/10 Very Good! (1,027 reviews)
Room had paper thin walls, could hear conversation very clearly without even trying. Canal wasn’t as pleasant as listed. Found ants inside the dresser. Smelled strong of mold/mildew.

Reviewed on May 16, 2026

Coconut Cay Resort & Marina
Tranquility Bay Beachfront Hotel and Resort

Tranquility Bay Beachfront Hotel and Resort

4 out of 5
2600 Overseas Hwy Marathon FL
  • 26 min drive from Dolphin Research Center
Book a stay at this beach hotel in Marathon. Enjoy free WiFi, free parking, and 3 outdoor pools. Our guests praise the pool and the helpful staff in our reviews. ...
8.8/10 Excellent! (1,004 reviews)
The room and beach were beautiful! The room was quiet and comfortable—the balcony was a great way to unwind. Check in could use improvements—the attendant was busy texting in a back room and we had to yell to get her attention. Our room was upstairs (no elevator) and no assistance was offered. The ...

Reviewed on May 15, 2026

Tranquility Bay Beachfront Hotel and Resort
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

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