Grassy Key, FL

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 ￥15,650 per night from Sep 8 to Sep 9
￥15,650
￥24,766 total
Sep 8 - Sep 9
includes taxes & fees
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! (1,010 reviews)
"Wow this place was awful. Tried to surprise my wife with a getaway now she wants a divorce. All because how bad this place was. The smell was so bad I could not continue the stay and drove midnight all the way home."

Reviewed on Aug 25, 2026

Rainbow Bend Resort
Grassy Flats Resort & Beach Club

Grassy Flats Resort & Beach Club

4 out of 5
58182 Overseas Hwy Marathon FL
Fully refundableReserve now, pay when you stay
The price is ￥22,742 per night from Sep 24 to Sep 25
￥22,742
￥33,215 total
Sep 24 - Sep 25
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
Gulf View Waterfront Resort

Gulf View Waterfront Resort

2.5 out of 5
58743 OVERSEAS HWY Marathon FL
The price is ￥12,457 per night from Aug 30 to Aug 31
￥12,457
￥14,014 total
Aug 30 - Aug 31
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
See all 2,365 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 Keys Cable Park are ...
10/10 Exceptional! (46 reviews)
"Beautiful property and Roman and Karen are wonderful hosts. The house is clean and well stocked. The linens and towels are high quality. The pool is perfect and the view is unmatched. We loved the property so much that we never wanted to leave. Roman and Karen are the nicest hosts and available for ..."

Reviewed on Aug 1, 2026

Wide Horizon oceanfront. 4 bedroom, 4 ½ bath, kayaks, pool + observation deck.
🌊 Private Oasis With Pool Spa Dock and Ocean right in your backyard 🌊 allow pets

🌊 Private Oasis With Pool Spa Dock and Ocean right in your backyard 🌊 allow pets

Marathon FL
Stay at this vacation home in Marathon. Enjoy free WiFi, private pools, and a garden. Popular attractions Crawl Key and Curry Hammock State Park are located ...
9.2/10 Wonderful! (64 reviews)
"We had a great week at this property and ultimately gave it 5 stars because it delivered exactly what we needed: an unbeatable location, beautiful water views, and a convenient home base for exploring the Keys.The biggest strengths are definitely the setting and location. The views are fantastic, ..."

Reviewed on Jul 5, 2026

🌊 Private Oasis With Pool Spa Dock and Ocean right in your backyard 🌊 allow pets
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 ...
9.8/10 Exceptional! (353 reviews)
"Very clean nice and peaceful"

Reviewed on Aug 23, 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

￥6,005
per adult
Marathon: Rhum Runner Aqua Park Adventure
Mangroves and Manatees - Guided Kayak Eco Tour

Mangroves and Manatees - Guided Kayak Eco Tour

￥11,013
per adult
92% of travellers recommend
Mangroves and Manatees - Guided Kayak Eco Tour
Sunset Cruise

Sunset Cruise

￥14,229
per adult
100% of travellers recommend
Sunset Cruise
Marathon, Florida Keys: Sunset Cruise with Local Seafood

Marathon, Florida Keys: Sunset Cruise with Local Seafood

￥15,323
per adult
Marathon, Florida Keys: Sunset Cruise with Local Seafood
Day Sailing Adventure in the Florida Marine Sanctuary

Day Sailing Adventure in the Florida Marine Sanctuary

￥19,153
per adult
100% of travellers recommend
Day Sailing Adventure in the Florida Marine Sanctuary
Cruisin Tikis Marathon - Sunset Tiki Cruise

Cruisin Tikis Marathon - Sunset Tiki Cruise

￥15,801
per adult
Cruisin Tikis Marathon - Sunset Tiki Cruise
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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