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Discover the vibrant underwater world at Sombrero Reef and relax at Molasses Key Sandbar on this 3.5-hour snorkeling tour in Marathon, Florida.
If you’re heading to Marathon, Florida, and love the idea of combining marine life exploration with some laid-back island time, the Marathon Sombrero Reef Snorkeling and Sandbar Swim tour might just be your perfect outing. This 3.5-hour adventure is designed to give you a taste of the Keys’ famed underwater scenery and a peaceful escape to a private sandbar, all while staying comfortable and well-cared-for.
We like this tour for its two distinct experiences—snorkeling at the iconic Sombrero Reef and relaxing on the secluded Molasses Key Sandbar. Both spots are known for their natural beauty and marine activity, making it a comprehensive day for anyone interested in seeing the best of Marathon’s marine environment. The fact that the trip is led by a licensed captain and includes snorkeling gear, a floating mat, and refreshments shows a focus on convenience and safety.
However, one thing to keep in mind is the moderate physical fitness level required, since snorkeling and some walking/climbing at the sandbar are involved. Also, as a group-limited experience with a maximum of 26 travelers, it tends to fill up quickly, so booking in advance is advisable. This tour suits travelers who appreciate a balanced mix of underwater adventure and tranquil island lounging—perfect for families, couples, or solo explorers wanting a well-rounded Keys experience.

For underwater exploration, these Key West snorkeling spots offer different experiences
The adventure begins at Faro Blanco Marina, a convenient departure point in Marathon. Setting sail from this marina, you’ll board a power catamaran, which offers a stable and comfortable platform for your journey. The boat is equipped with a licensed captain who will navigate you towards your first stop, Sombrero Reef.
Sombrero Reef is one of the most popular snorkeling spots in Marathon. About four nautical miles from the coast, this tongue & spur reef features mature coral formations and an abundance of tropical fish. This site is renowned for its clarity and vibrant marine life, making it a favorite among both beginners and seasoned snorkelers.
According to reviews, visitors often describe this portion as “teeming with marine activity” and “a feast for the eyes,” with some noting how the coral is especially impressive. The large reef environment allows you to swim among tropical fish, maybe spot some colorful parrotfish, angelfish, or even a curious barracuda. The equipment provided makes it easy to explore, and the guided aspect helps newcomers feel more confident.
After an hour of exploring the reef, the boat moves closer to Molasses Key Sandbar. This stretch of shallow water is noted for its peaceful isolation, away from the crowds that often flock to busier Keys beaches. Here, you’ll find a broad stretch of sand perfect for lounging, exploring, or even a quick second snorkel if you wish.
Reviews frequently mention the “stunning views” and the tranquil vibe of this spot. It’s an ideal place to relax on the floating mat, soak up the sun, or wade in the shallow waters. It’s worth noting that while most enjoy the calm and solitude, some travelers comment on the “simple but authentic” feel of the sandbar, which adds to its charm.
The tour concludes back at Faro Blanco Marina, giving you a relaxed return journey. Since the entire experience lasts roughly 3.5 hours, it offers plenty of time for fun in the water without feeling rushed.

At $139 per person, this tour packs in a lot. For the price, you get snorkeling at a top-rated reef, relaxing at a private sandbar, all equipment included, and the expertise of a licensed captain. The cooler and ice mean you can keep your drinks and snacks handy, enhancing comfort. While it’s not the cheapest option in the Keys, the combination of two destinations in one outing offers a strong balance of value and quality.

This experience is ideal for travelers who want a balanced day of marine exploration and relaxation. It’s perfect for families with children who can snorkel, couples seeking a romantic outing, or solo travelers looking to connect with nature. If you’re keen on seeing vibrant coral reefs and tropical fish but also value peaceful, uncrowded spots, this trip hits the sweet spot.

The Marathon Sombrero Reef Snorkeling and Sandbar Swim offers a well-rounded glimpse of the Keys’ underwater and island scenery. You’ll leave with good memories of seeing colorful marine life and enjoying a quiet stretch of sand, all without the hassle of planning multiple excursions. It’s a practical choice that balances adventure, relaxation, and value.
If your goal is to experience the marine world with comfort and authenticity, and you’re okay with a moderate physical level, this tour deserves strong consideration. It’s a straightforward, reliable way to connect with the natural beauty of Marathon’s waters, making it a standout option among the many excursions available in the area.

What is the tour duration?
Approximately 3 hours 30 minutes, including snorkeling and relaxing at the sandbar.
Where does the tour start and end?
It begins and ends at Faro Blanco Marina in Marathon, FL.
What time does the tour depart?
It starts at 2:00 pm, so plan to arrive a little earlier for check-in.
Is snorkeling gear included?
Yes, snorkeling equipment is provided for your convenience.
What should I bring?
Bring sunscreen, a hat, sunglasses, and possibly a camera. The cooler and ice are provided for snacks and drinks.
How many people are on the trip?
A maximum of 26 travelers, ensuring a more intimate experience.
Is the tour suitable for children?
While the tour is designed for those with moderate fitness levels, children comfortable with snorkeling will enjoy the experience.
What if the weather is bad?
The tour is weather-dependent. If canceled due to poor conditions, you’re offered a different date or a full refund.
Can I snorkel more than once?
Yes, at the sandbar, you can explore or snorkel again if you wish.
How do I book?
Through the provided Viator link or by contacting Solé Watersports directly at +13053511546 or [email protected].
With its scenic stops, expert guidance, and comfortable amenities, the Marathon Sombrero Reef Snorkeling and Sandbar Swim tour makes a strong case for being a memorable Keys experience that balances adventure and relaxation. Whether it’s your first time snorkeling or you’re simply looking to unwind on a quiet sandbar, this trip offers genuine value wrapped in the natural beauty of the Florida Keys.