Things to do in Grassy Key

Learn about the playful nature of dolphins before swimming alongside these clever marine mammals at this entertaining research facility.

Play beach games; go swimming, kayaking or snorkeling; and lounge in the sun at one of Marathon’s most visited beaches.

Walk, jog, cycle or drive across one of the longest bridges in North America to take in the scenic ocean views it provides.

Commune with nature and explore the great outdoors at Vaca Key during your travels in Marathon. Stroll along the seaside or discover the area's beautiful sunsets.

Go camping near mangroves, bird-watching beneath a thick canopy or kayaking between the islands of this scenic state park in the Middle Keys.

Why not spend a lazy afternoon at Coco Plum Beach during your trip to Marathon? Discover the area's beautiful sunsets, or seek out its jogging trails.

Explore the campus of The Turtle Hospital during your stay in Marathon. Stroll along the area's seaside, or simply savor its seafood restaurants.

You can spend an afternoon exploring the galleries in Crane Point Museum and Nature Center in Marathon. Discover the area's beautiful sunsets, or seek out its jogging trails.

Commune with nature and explore the great outdoors at Boot Key Harbor during your travels in Marathon. Discover the area's beautiful sunsets and seafood restaurants.