Grassy Key Marina is a laid-back boating hub in Marathon, Florida, offering convenient Gulf access, calm anchorage, and a gateway to world-class fishing and reef diving.
Grassy Key Marina sits at mile marker 58 on the Overseas Highway, placing it squarely in the heart of the Florida Keys between Key Largo and Key West. The marina serves recreational boaters, anglers, and visiting cruisers looking for a quieter alternative to the busier facilities in downtown Marathon. Its bayside position gives access to Florida Bay, the Gulf of Mexico, and the Atlantic via nearby cuts.
Anglers working out of Grassy Key Marina target a remarkable range of species. The flats hold bonefish, permit, and tarpon, while deeper offshore water produces mahi-mahi, wahoo, and sailfish. Nearby Coffins Patch Reef draws snorkelers and divers, and local fishing charters can put you on productive grounds within minutes of leaving the dock.
The surrounding area rewards exploration beyond the water. Curry Hammock State Park is just a few miles away and offers paddling trails, a swimming beach, and some of the best hawk-watching in the Keys during fall migration. The broader Marathon area has a solid selection of seafood restaurants and waterfront spots where a day on the water ends well.
Grassy Key Marina rewards visitors who value access over amenities, putting some of the most productive and scenic waters in the Florida Keys within easy reach.
Visit during the early morning hours when winds are calm and the flats fishing is at its best.
Bring polarized sunglasses to spot bonefish and permit in the shallow grass beds just off the key.
Top off fuel and supplies here before heading offshore, as services thin out quickly on the water.
Try kayaking the nearby mangrove channels at low tide for an up-close look at juvenile marine life.
Check tide charts before planning a departure, as shallow cuts in the area require careful timing.
Snorkel the reef, relax at Valhalla Sandbar, then cruise back at sunset
Take the helm on a 25’ center console for fishing, snorkeling, or sandbar time
Fish, snorkel, or relax at sandbars on a versatile dual-console boat
Set out to fish from a 20-foot Cape Horn center console
Fish and visit the sandbar aboard a 21-foot center-console
Fish or dive from a 25-foot Proline with a fin-friendly boarding ladder
A shaded center-console boat for flexible time on the water
A family-friendly boat for sandbars, reefs, and fishing
Explore sandbars, snorkeling spots, and fishing areas by boat
Get out on the water aboard a shaded 24-foot deck boat
Enjoy a durable floating water mat for family time on the water