Grassy Key

Travel Guide

A dolphin swimming near a wooden dock and a tree branch in the water.
A beach with clear turquoise water, surrounded by lush green trees and a distant shoreline with buildings.
A calm bay with clear turquoise water, surrounded by lush green vegetation and a sandy beach.
A building with a blue awning labeled "Dolphin Research Center" and a dolphin logo.
A dolphin sculpture and a sign for the Dolphin Research Center.
Rainbow Bend Resort

Rainbow Bend Resort

2.5 out of 5
57784 Overseas Hwy Marathon FL
The price is RM419 per night from 9 Nov to 10 Nov
RM419
RM654 total
9 Nov - 10 Nov
includes taxes & fees
Stay at this beach hotel in Marathon. Enjoy free breakfast, free Wi-Fi and free parking. Our guests praise the breakfast and the helpful staff in their reviews. ...
8.2/10 Very good! (1,000 reviews)
"My only issue with it is the room had a pretty heavy mold odor. Awesome view, nice little beach area. All and all was a good stay"

Reviewed on 4 Nov 2026

Rainbow Bend Resort
Gulf View Waterfront Resort

Gulf View Waterfront Resort

2.5 out of 5
58743 OVERSEAS HWY Marathon FL
The price is RM489 per night from 1 Dec to 2 Dec
RM489
RM550 total
1 Dec - 2 Dec
includes taxes & fees
Stay at this hotel in Marathon. Enjoy free Wi-Fi, free parking and daily housekeeping. Our guests praise the helpful staff and the clean rooms in their reviews. ...
Gulf View Waterfront Resort
Grassy Flats Resort & Beach Club

Grassy Flats Resort & Beach Club

4 out of 5
58182 Overseas Hwy Marathon FL
The price is RM745 per night from 6 Dec to 7 Dec
RM745
RM1,032 total
6 Dec - 7 Dec
includes taxes & fees
Stay at this hotel in Marathon. Enjoy free Wi-Fi, free parking and 2 outdoor pools. Our guests praise the helpful staff and the property condition in their reviews. ...
9.4/10 Exceptional! (504 reviews)
"Loved everything about this place!"

Reviewed on 5 Nov 2026

Grassy Flats Resort & Beach Club
See all 2,341 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.
Yacht Haven Marina

Yacht Haven Marina

3.5 out of 5
5 Sombrero Blvd Marathon FL
Stay at this houseboat in Marathon. Enjoy free Wi-Fi, free parking and a picnic area. Our guests praise the helpful staff in their reviews. Popular attractions ...
9.6/10 Exceptional! (381 reviews)
"Very unique place to stay."

Reviewed on 6 Nov 2026

Yacht Haven Marina
Skipjack Resort & Marina

Skipjack Resort & Marina

3 out of 5
19 Sombrero Blvd Marathon FL
Stay at this golf aparthotel in Marathon. Enjoy free parking, a marina and a fitness centre. Our guests praise the breakfast and the pool in their reviews. Popular ...
Skipjack Resort & Marina
Tropical Cottages

Tropical Cottages

3 out of 5
243 61st Street Gulf Marathon FL
Stay at this cottage in Marathon. Enjoy free parking, daily housekeeping and a garden. Popular attractions Sombrero Beach and Seven Mile Bridge are located ...
8.6/10 Excellent! (1,013 reviews)
"The family running the food truck and tiki hut were great. Felt like we were guests in their home."

Reviewed on 30 Oct 2026

Tropical Cottages
See all 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.

Things to do

High chances of seeing manatees

Mangroves and Manatees - Guided Kayak Eco Tour

RM280
per adult
90% of travellers recommend
Mangroves and Manatees - Guided Kayak Eco Tour
Sunset Cruise

Sunset Cruise

RM362
per adult
100% of travellers recommend
Sunset Cruise
Marathon: Rhum Runner Aqua Park Adventure

Marathon: Rhum Runner Aqua Park Adventure

RM153
per adult
Marathon: Rhum Runner Aqua Park Adventure
Marathon FL Sandbar Cruise & Sightseeing Adventure

Marathon FL Sandbar Cruise & Sightseeing Adventure

RM462
per adult
100% of travellers recommend
Marathon FL Sandbar Cruise & Sightseeing Adventure
Day Sailing Adventure in the Florida Marine Sanctuary

Day Sailing Adventure in the Florida Marine Sanctuary

RM487
per adult
100% of travellers recommend
Day Sailing Adventure in the Florida Marine Sanctuary
Marathon: Private Cable or Cable Kiteboarding Session

Marathon: Private Cable or Cable Kiteboarding Session

RM720
per traveller
Marathon: Private Cable or Cable Kiteboarding Session
See all activities in Grassy Key

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