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Discover vibrant marine life and relax at Valhalla Sandbar with this 3.5-hour snorkeling and sandbar combo tour in Marathon, Florida, led by knowledgeable guides.

This 3.5-hour tour in Marathon, Florida, offers an engaging combination of snorkeling at Coffins Patch Coral Reef and unwinding on Valhalla Sandbar. Priced affordably, it includes everything needed to enjoy the Florida Keys’ marine beauty, making it ideal for those eager to explore reef ecosystems and enjoy a laid-back sandbar experience. The tour is led by a US Coast Guard licensed captain, ensuring safety and professional guidance throughout.
What makes this tour stand out is its focus on the third-largest barrier reef in the world, along with the chance to discover conch, starfish, horseshoe crabs, and elusive sea horses. The two main stops—Coffins Patch and Valhalla Sandbar—offer distinct experiences: vibrant underwater exploration and relaxing shallow waters. The tour suits snorkelers of varying experience levels and those looking for a mix of adventure and leisure. However, it’s worth noting that non-swimmers or those prone to seasickness may find the experience less suitable.
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Planning more time in Marathon Florida? We've covered other experiences worth considering.

The tour departs from Marina Marathon at Tarpon Creek. Travelers find it convenient to meet behind the Fairfield Inn and Suites near Sparky’s Landing Restaurant, where they can also pick up essentials like snacks, drinks, sunscreen, and towels at the Marina Store. The coordinates (24.731164932250977, -81.01876831054688) guide arrivals precisely.
Booking offers free cancellation up to 24 hours before and the option to reserve now, pay later, providing flexibility for travelers’ planning. The live tour guide speaks English and keeps the group informed throughout the experience.

The Coffins Patch Coral Reef is the central highlight of this tour. Located about four nautical miles from the coast, this open water patch reef reaches depths of 8 to 18 feet. The reef features a mix of soft and hard corals, providing a lively habitat for tropical sea life. Snorkelers enjoy a self-guided tour of the area, with an approximate 70-minute window to explore the underwater landscape.
This reef is a part of the third-largest barrier reef in the world, making it a significant site for marine exploration. The abundance of marine species ensures a vibrant snorkeling experience. As conditions vary, the crew monitors the sea state, and if the outer reef isn’t accessible, the trip transitions to shallow water snorkeling at Valhalla Sandbar instead.
Valhalla Sandbar offers a complete change of pace from the underwater world. This broad sandy area features white sands and a water depth of 1 to 3 feet, making it perfect for shallow water snorkeling, swimming, and relaxing. It’s often called the beach of the Keys for its inviting environment.
On the sandbar, visitors can discover conch shells, Bahamian starfish, horseshoe crabs, and rare sea horses, adding excitement to the leisure time. This stop typically lasts about 70 minutes, giving enough time to swim in shallow waters or simply lounge in the sun. When sea conditions restrict outer reef access, this stop becomes the primary focus, complemented by a Toms Harbor eco-tour.
More Great Tours NearbyThe tour begins at Marina Marathon and includes a scenic boat cruise to the Bonefish Towers, offering sightseeing, dolphin watching, and wildlife viewing over a 25-minute stretch. The journey continues to Coffins Patch Reef for snorkeling, followed by a cruise through Hawk Channel—another opportunity for dolphin sightings and scenic views.
Next, the boat visits Grassy Key Sandbar for a second round of shallow water exploration lasting about 70 minutes, perfect for relaxing or snorkeling. The final stop is Curry Hammock State Park, where guests enjoy more wildlife viewing and sightseeing during a 20-minute cruise before returning to Tarpon Creek.

The tour’s focus on marine life discovery is clear. Snorkelers can expect to see conchs, starfish, horseshoe crabs, and the elusive sea horses. The guides are praised for their knowledgeable and fun approach, making sure that all participants feel safe and included regardless of their snorkeling experience.
When outer reef access is not possible, the tour still delivers an enjoyable experience by focusing on shallow water snorkeling at Valhalla Sandbar and eco-tour activities around Toms Harbor. This flexibility ensures participants still get a taste of the Florida Keys’ unique environment.
The meeting point is straightforward, with travelers advised to arrive behind the Fairfield Inn and Suites and check in at the Marina Store. Bringing swimwear, a towel, sunscreen, and waterproof camera is recommended. Touching marine life is not allowed, helping preserve the fragile ecosystem.
The tour is not suitable for non-swimmers or those prone to seasickness, due to the boat rides and open water activities. The duration of 3.5 hours allows for a well-paced trip, balancing active snorkeling with relaxing stops, all under the supervision of experienced guides.
Reviews highlight the knowledge and friendliness of the guides, specifically mentioning Michael & Jason for their fantastic support. They excel at making everyone feel comfortable and ensuring diverse experience levels participate fully. The guides’ ability to explain marine environments clearly elevates the experience.
This snorkel and sandbar combo tour offers a balanced mix of underwater discovery and shallow water relaxation, perfect for those looking for a short yet immersive Keys experience. The vibrant reef at Coffins Patch paired with the tranquil sands of Valhalla Sandbar delivers a variety of environments in just 3.5 hours.
The knowledgeable guides and flexible itinerary make this tour particularly appealing, especially for families, casual snorkelers, and eco-enthusiasts. Its main limitations are not suitable for non-swimmers or seasick-prone travelers, but overall, it provides excellent value and a memorable taste of the Florida Keys’ marine life.
Is this tour suitable for non-swimmers?
No, the tour requires snorkeling skills, so it is not recommended for non-swimmers.
What marine animals will I see?
You can expect to see conch, starfish, horseshoe crabs, and sea horses, along with tropical fish and other marine life.
How long is the snorkeling at Coffins Patch Reef?
Snorkeling at Coffins Patch lasts approximately 70 minutes.
What if sea conditions prevent outer reef access?
The trip transitions to shallow water snorkeling at Valhalla Sandbar and includes a Toms Harbor eco-tour.
Where do I meet for the tour?
The meeting point is behind the Fairfield Inn and Suites at Tarpon Creek, near Sparky’s Landing Restaurant.
What should I bring?
Bring swimwear, a towel, sunscreen, and waterproof camera for the best experience.
Is the tour family-friendly?
Yes, it suits travelers comfortable with snorkeling and boat rides, but non-swimmers or those with seasickness issues may want to consider other options.
Can I cancel or reschedule?
Yes, the tour offers free cancellation up to 24 hours in advance and reserve now, pay later options.
How experienced are the guides?
Guides like Michael & Jason are praised for their knowledgeable and friendly approach, making the experience enjoyable and safe.
What makes this tour stand out compared to others?
Its combination of vibrant reef snorkeling, relaxing sandbar environment, and professional guidance provide a well-rounded Keys adventure in just over three hours.