The Best Spots for Snorkeling & Diving in Marathon, Florida

Marathon is a paradise for underwater explorers, offering some of the best snorkeling and diving experiences in the Florida Keys. With crystal-clear waters, vibrant coral reefs, and abundant marine life, it’s the perfect destination for anyone looking to dive into adventure.

Whether you’re a seasoned diver or a first-time snorkeler, these top spots in Marathon will leave you in awe.

1. Sombrero Reef – A Snorkeler’s Dream

One of the most famous snorkeling spots in the Keys, Sombrero Reef is a must-visit. This protected marine sanctuary boasts an impressive variety of coral formations and marine life, including parrotfish, angelfish, and even the occasional sea turtle. With depths ranging from 2 to 30 feet, it’s perfect for both beginners and experienced snorkelers.

2. Coffins Patch – Hidden Coral Gardens

A lesser-known gem, Coffins Patch is a collection of shallow patch reefs that offer incredible snorkeling and diving opportunities. The area is teeming with colorful sea fans, sponges, and an array of tropical fish. It’s an excellent choice for those looking for a more secluded snorkeling experience away from the crowds.

diving with sea turtle

3. The Thunderbolt Wreck – A Diver’s Paradise

For advanced divers, the Thunderbolt Wreck is an unforgettable experience. This 188-foot ship was intentionally sunk to create an artificial reef, and over the years, it has become home to barracudas, goliath groupers, and vibrant corals. Sitting at a depth of about 120 feet, this site is best suited for experienced divers with wreck-diving certification.

4. The Lagoon at Curry Hammock State Park – Perfect for Beginners

If you’re new to snorkeling or traveling with kids, the calm and shallow waters at Curry Hammock State Park provide a fantastic introduction to the underwater world. While not as deep or colorful as offshore reefs, it’s a great place to spot small fish, crabs, and even stingrays in a safe and relaxed environment.

5. The Florida Keys National Marine Sanctuary – A Protected Wonderland

Stretching throughout the Keys, the Florida Keys National Marine Sanctuary offers numerous diving and snorkeling spots filled with pristine coral reefs and marine biodiversity. In Marathon, you’ll find several designated areas where you can explore protected waters, ensuring an unforgettable and eco-friendly experience.

Tips for Snorkeling & Diving in Marathon:

  • Go with a guide: Booking a tour ensures you visit the best locations safely and learn more about the marine life.
  • Respect marine life: Avoid touching corals or feeding fish to help preserve the delicate ecosystem.
  • Check conditions: Wind and tides can affect visibility, so check weather forecasts before heading out.
  • Bring reef-safe sunscreen: Protect both your skin and the coral reefs by using eco-friendly sunscreen options.

Dive into Adventure!

Whether you’re floating above vibrant coral gardens or descending into the depths of a shipwreck, Marathon, Florida, offers incredible underwater experiences for every skill level. Book your stay and get ready to explore the breathtaking marine world of the Florida Keys!