A short, sun-forward boat trip from Marathon brings you to Grassy Key’s shallow sandbar for floating mats, snorkeling, and easy swimming. This two‑hour excursion highlights clear water, white sand bottoms and family-friendly stops led by USCG-licensed captains.
More ways to explore the area's outdoor wonders
The boat eases out of Tarpon Creek Marina and the Atlantic opens like a cool mirror—shallow, clear, and waiting. Within minutes the captain points toward a pale ribbon of white sand and you can see the sandbar sitting in ankle- to chest-deep water (roughly 1–3 feet), a natural shallow playground where the ocean slows and invites you to wade, float, and snorkel.
Difficulty
easy
Duration
2 hours
Fitness Level
Suitable for most fitness levels; requires short boat boarding and light swimming or standing in shallow water.
Wildlife
History
The Middle Keys were shaped by coral and limestone deposition; communities here developed from fishing, salvage, and small‑boat trade and remain centered on boating culture.
Conservation
Use reef‑safe products, avoid touching seagrass or reef, and follow captain guidance to minimize impacts on fragile shallow habitats.
Reserve your spot on the Marathon: Local Sandbar Escape today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring reef‑safe sunscreen
The Middle Keys get strong sun even on breezy days—apply and reapply reef‑safe sunscreen before boarding and between swims.
Wear water shoes
The sandbar has patches of shell and seagrass—light water shoes protect feet when wading or jumping from the boat.
Stay hydrated
A cooler and filtered water are provided, but bring your own refillable bottle to stay hydrated under the sun.
Prep for motion
If you get seasick, take preventative meds before departure—this trip is short but the ride to the sandbar can still be bumpy.
Reef‑safe sunscreen
Protects skin and local coral—preferred over regular sunscreens in Florida waters.
Water shoes
Protects feet on the sandbar and when boarding from the water.
summer
Quick‑dry towel or change of clothes
Useful after swimming and for the ride back to shore.
Waterproof phone case or dry bag
Keeps electronics and keys dry while you swim and float.