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 ...

8/10 Very Good! (716 reviews)

Cute, clean

"Older property, no beach access as this is a fishing resort but cute and clean. Cafe was confusing to order food from, but good once we figured it out.... this property is not really walkable to anything like food or a bar. Pool was great."

Reviewed on Aug. 14, 2025

Grassy Flats Resort & Beach Club

58182 Overseas Hwy, Marathon, FL

14 min walk from Dolphin Research Center

Book a stay at this beach hotel in Marathon. Enjoy free WiFi, free parking, and 2 outdoor pools. Our guests praise the helpful staff and the property condition ...

9.2/10 Wonderful! (305 reviews)

"Staff was friendly and accommodating. Pool area was nice and relaxing."

Reviewed on Aug. 9, 2025

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! (486 reviews)

"This is a fairly clean place. It has a great location to the water with jet ski rental at the property. The only real issue is the rooms are extremely noisy. We could here every step of the occupants above us and the highway noise was very loud in the room."

Reviewed on Jul. 18, 2025

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.