Things to do in Grassy Key

Find and book activities, attractions and tours

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.

Things to do

Marathon: Rhum Runner Aqua Park Adventure

Marathon: Rhum Runner Aqua Park Adventure

$38
per adult
Marathon: Rhum Runner Aqua Park Adventure
Sunset Cruise

Sunset Cruise

$89
per adult
100% of travellers recommend
Sunset Cruise
Day Sailing Adventure in the Florida Marine Sanctuary

Day Sailing Adventure in the Florida Marine Sanctuary

$120
per adult
100% of travellers recommend
Day Sailing Adventure in the Florida Marine Sanctuary
Sandbar Adventure Cruise in the Florida Keys

Sandbar Adventure Cruise in the Florida Keys

$102
per adult
100% of travellers recommend
Sandbar Adventure Cruise in the Florida Keys
Sister snorkelers :)

Marathon: COMBO- Snorkel & Sandbar (Sombrero Reef)

$154
per adult
Marathon: COMBO- Snorkel & Sandbar (Sombrero Reef)
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Most popular activities in Grassy Key

Tours & day trips

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Mangroves and Manatees - Guided Kayak Eco Tour

Mangroves and Manatees - Guided Kayak Eco Tour

Activity duration is 2 hours
9.6 out of 10 with 471 reviews
Free cancellation available
Price is $69 per adult
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Wildlife & nature

See all 8 activities
Marathon, Florida Keys: Sunset Cruise with Local Seafood

Marathon, Florida Keys: Sunset Cruise with Local Seafood

Activity duration is 2 hours
9.6 out of 10 with 7 reviews
Free cancellation available
Price is $77 per adult
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Private & custom tours

See all 7 activities
Phone photography

Phone photography

Activity duration is 30 minutes
Free cancellation available
Price is $100 per traveler*
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Holiday & seasonal tours

See all 3 activities
Phone photography

Phone photography

Activity duration is 30 minutes
Free cancellation available
Price is $100 per traveler*
Phone photographyOpens in new tab

What to do in Grassy Key

 

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Popular day trips from Grassy Key

Marathon

Marathon

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