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 CA $142 per night from Oct 29 to Oct 30
CA $142
CA $222 total
Oct 29 - Oct 30
includes taxes & fees
Book a stay at this beach hotel in Marathon. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the helpful staff in our ...
8.2/10 Very good! (1,002 reviews)
"Staff was great at checking in and gave us complimentary champagne and allowed us to check in early so we could head out early."

Reviewed on Oct 26, 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 CA $149 per night from Oct 27 to Oct 28
CA $149
CA $168 total
Oct 27 - Oct 28
includes taxes & fees
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. ...
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 CA $279 per night from Nov 8 to Nov 9
CA $279
CA $381 total
Nov 8 - Nov 9
includes taxes & fees
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. ...
Grassy Flats Resort & Beach Club
See all 2,360 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.
Wide Horizon oceanfront. 4 bedroom, 4 ½ bath, kayaks, pool + observation deck.

Wide Horizon oceanfront. 4 bedroom, 4 ½ bath, kayaks, pool + observation deck.

Marathon FL
Book a stay at this beach vacation home in Marathon. Enjoy free WiFi, private pools, and a beach locale. Popular attractions Crawl Key and Grassy Key Marina ...
10/10 Exceptional! (49 reviews)
"Awesome views. Clean house. Fun places within walking and biking distance. Had a great time with the family playing the provided games and hanging out by the pool."

Reviewed on Oct 19, 2026

Wide Horizon oceanfront. 4 bedroom, 4 ½ bath, kayaks, pool + observation deck.
Brand New Three-Story Home's in Gated Community with Beach & Pool

Brand New Three-Story Home's in Gated Community with Beach & Pool

Marathon FL
Book a stay at this beach vacation home in Marathon. Enjoy free WiFi, a beach locale, and a water park. Popular attractions Keys Cable Park and Grassy Key Marina ...
10/10 Exceptional! (1 review)
"Beautiful property and very responsive host."

Reviewed on Jul 5, 2026

Brand New Three-Story Home's in Gated Community with Beach & Pool
Yacht Haven Marina

Yacht Haven Marina

3.5 out of 5
5 Sombrero Blvd Marathon FL
Stay at this houseboat in Marathon. Enjoy free WiFi, free parking, and a picnic area. Our guests praise the helpful staff in our reviews. Popular attractions ...
9.6/10 Exceptional! (374 reviews)
"It was exactly what you see in the pictures. The only thing I would advise is listing the plumbing situation. We had absolutely no problem with it. However if people are looking for legitimate in door plumbing keep in mind this is a boat so it is just a little under par. But still functional. Great ..."

Reviewed on Oct 25, 2026

Yacht Haven Marina
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

Marathon: Rhum Runner Aqua Park Adventure

Marathon: Rhum Runner Aqua Park Adventure

CA $53
per adult
Marathon: Rhum Runner Aqua Park Adventure
Mangroves and Manatees - Guided Kayak Eco Tour

Mangroves and Manatees - Guided Kayak Eco Tour

CA $97
per adult
92% of travellers recommend
Mangroves and Manatees - Guided Kayak Eco Tour
Sandbar Adventure Cruise in the Florida Keys

Sandbar Adventure Cruise in the Florida Keys

CA $144
per adult
100% of travellers recommend
Sandbar Adventure Cruise in the Florida Keys
Day Sailing Adventure in the Florida Marine Sanctuary

Day Sailing Adventure in the Florida Marine Sanctuary

CA $169
per adult
100% of travellers recommend
Day Sailing Adventure in the Florida Marine Sanctuary
Marathon: Cruisin' Tikis Marathon - Private Sunset Cruise

Marathon: Cruisin' Tikis Marathon - Sunset Cruise

CA $155
per adult
Marathon: Cruisin' Tikis Marathon - Sunset Cruise
Marathon Key FL: Snorkel Trips and Sunset Cruises

Marathon: Snorkeling and Sunset Cruises

CA $99
per adult
Marathon: Snorkeling and Sunset Cruises
See all activities in Grassy Key

Cities near Grassy Key

A beach with clear water, palm trees, and people relaxing on the sand.

Marathon

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