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Pet-friendly Hotels in Grassy Key

Rainbow Bend Resort

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! (867 reviews)

Room 22 was without a nice patio as advertised on Expedia. When we entered the room, there was an extremely strong odor of bleach. Mold in the shower. Kitchen wasn't equipped enough. Just a few plates, cups and utensils. Everything seemed dirty, not washed properly. Not enough beach chairs for all ...

Reviewed on Mar 1, 2026

Grassy Flats Resort & Beach Club

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! (409 reviews)

Room was super clean and the staff was very accommodating….can’t wait to go back!!

Reviewed on Mar 1, 2026

Gulf View Waterfront Resort

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! (555 reviews)

The good parts: staff were friendly and accommodating. The room and pool were clean. There is a great bar/restaurant within walking distance away. It was nice to have a full size fridge and stove to use if needed. They also have kayaks and paddle boards to use at no charge. But, beware…it is difficult ...

Reviewed on Mar 3, 2026

See all 2,301 properties in Grassy Key

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.