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 ￥16,812 per night from Jul 15 to Jul 16
￥16,812
￥26,219 total
Jul 15 - Jul 16
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! (1,009 reviews)
"Nice hidden gem! The room was very clean. The beds were extremely comfortable. The property was well taken care of and quiet was a great halfway point while exploring the Florida Keys!"

Reviewed on Jul 8, 2026

Rainbow Bend Resort
Grassy Flats Resort & Beach Club

Grassy Flats Resort & Beach Club

4 out of 5
58182 Overseas Hwy Marathon FL
The price is ￥32,449 per night from Aug 10 to Aug 11
￥32,449
￥44,297 total
Aug 10 - Aug 11
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. ...
9.4/10 Exceptional! (468 reviews)
"The staff were nice. The rooms were cleaned daily and"

Reviewed on Jul 7, 2026

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 ￥23,263 per night from Jul 12 to Jul 13
￥23,263
￥26,171 total
Jul 12 - Jul 13
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. ...
8.4/10 Very Good! (593 reviews)
"We love that the rooms are set up for coffee and light meal prep. Plenty of tables outside to eat at as well and lots of green space for kids and dogs! Rooms are always clean and with late check in codes are shared for easy access to your room."

Reviewed on Jul 10, 2026

Gulf View Waterfront Resort
See all 2,380 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.
🌊 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! (63 reviews)
"Amazing place to stay. Pool and dock make this place worth every penny would stay again. Frank was great to deal with if we had any questions he responded right away."

Reviewed on Jun 25, 2026

🌊 Private Oasis With Pool Spa Dock and Ocean right in your backyard 🌊 allow pets
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! (44 reviews)
"Place was great located close to what we wanted to do"

Reviewed on Jun 6, 2026

Wide Horizon oceanfront. 4 bedroom, 4 ½ bath, kayaks, pool + observation deck.
Waterfront Beauty 10-guests, Dock, Kayaks and more

Waterfront Beauty 10-guests, Dock, Kayaks and more

Marathon FL
Stay at this vacation home in Marathon. Enjoy private pools, laundry facilities, and patios. Popular attractions Keys Cable Park and Crawl Key are located ...
9.8/10 Exceptional! (9 reviews)
Good little spot for a family or small group
"Property was at the north end of Marathon so short drive to restaurants, stores, etc. The neighborhood was nice and quiet we really felt like we were the only ones there which was great. House was clean and had everything we needed in terms of kitchen appliances, working grill, plenty of towels/sheets/blankets/pillows. ..."

Reviewed on Jun 2, 2025

Waterfront Beauty 10-guests, Dock, Kayaks and more
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

Mangroves and Manatees - Guided Kayak Eco Tour

Mangroves and Manatees - Guided Kayak Eco Tour

￥11,215
per adult
92% of travellers recommend
Mangroves and Manatees - Guided Kayak Eco Tour
Marathon: Rhum Runner Aqua Park Adventure

Marathon: Rhum Runner Aqua Park Adventure

￥6,017
per adult
Marathon: Rhum Runner Aqua Park Adventure
Sunset Cruise

Sunset Cruise

￥14,260
per adult
100% of travellers recommend
Sunset Cruise
Marathon, Florida Keys: Sunset Cruise with Local Seafood

Marathon, Florida Keys: Sunset Cruise with Local Seafood

￥12,796
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

￥19,194
per adult
100% of travellers recommend
Day Sailing Adventure in the Florida Marine Sanctuary
Special moments made at Sunset

Marathon: Historic 7-Mile Bridge Sunset Cruise

￥19,992
per adult
Marathon: Historic 7-Mile Bridge Sunset 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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