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The Island of Marathon, Florida, in the Heart of the Keys

Last Updated on April 11, 2024

Marathon, Florida, in the middle of the Keys tropical isles, is surrounded by aqua-blue water and bordered to the south by coral reefs.

It has been attracting explorers since the 1820s. Despite the passage of time, today you can still experience its natural beauty, stunning seas, and a rich sense of history.

Tranquility Bay Beach House Resort in Marathon.
Source: Tranquility Bay Beach House Resort

The islands of Marathon, located in the heart of the Keys mid-way between Key Largo and Key West, make for a memorable – and authentic – Florida getaway. 

Fun Things to Do in Marathon, Florida

Marathon lighthouse.
Table of Contents

    Sombrero Key Lighthouse and Reef

    Sombrero Lighthouse.
    Source: B. Alter, FKNMS, Courtesy of NOAA Photo Library

    One of Marathon’s most spectacular sights lies 3.5 nautical miles off Boot Key.

    Completed in 1858, the Sombrero Key lighthouse was commissioned along with other Keys lighthouses by the U.S. government.

    This was meant to help prevent the numerous shipwrecks occurring along the Florida Reef.

    Captain pips scuba.
    Source: Captain Pips Marina & Hideaway

    Today snorkelers can see the still-working lighthouse and visit the coral reef with Captain Pip’s Charter Boats. (If you come in your own boat, be sure to use a mooring buoy instead of anchoring.)

    Swim with dozens of tropical fish: sergeant majors, stingrays, snapper, parrotfish, and barracuda, to name just a few.

    Captain Pips Marina and Hideaway.
    Source: Captain Pips Marina and Hideaway

    This utterly absorbing experience is a reminder that to truly appreciate the Florida Keys, you need to leave land behind and see what awaits beneath the waves.

    UPDATE: If you’ve never snorkeled before or you want to brush up on your knowledge of snorkeling, check out this incredible Snorkeling Guide on Jen Reviews:  https://www.jenreviews.com/snorkeling/ 

    Crane Point Museum and Nature Center

    Crane Point.
    Source: Crane Point

    Start your Middle Keys adventure on land at the Crane Point Museum and Nature Center.

    Stroll through tropical hammocks, and get a sense of the native plants and flowers that once grew in profusion on these islands.

    Adderly House.
    Source: Crane Point

    Step inside the Adderley House, the oldest Keys home outside of Key West, built by Bahamian couple George and Olivia Adderley over 100 years ago.

    Pelicans at the Wild Bird Center.
    Source: Wild Bird Center

    Be sure to see the Wild Bird Center, where rescued birds are brought for rehabilitation.

    Crane Point museum.
    Source: Crane Point

    The museum itself houses interesting artifacts from shipwrecks and the early pioneers. Visitors can also reserve a spot on a kayak adventure through mangroves and to three nearby islands. 

    Crane Point Address: 5550 Overseas Hwy, Marathon, FL 33050

    Marathon Air Museum

    Marathon Air Museum.
    Source: Marathon Air Museum

    For another glimpse into the past, visit the Marathon Air Museum (EAA Chapter) on the grounds of the Marathon airport.

    Whether you’re an avid aviation buff, or simply curious, this small museum is worth a stop.

    Marathon Air Museum Plane by the hangar.
    Source: Marathon Air Museum

    Local volunteers will share a wealth of knowledge while you tour the hangar with planes and the displays with memorabilia and models, including a model of a craft flown by the Wright brothers.

    Plane at Marathon Air Museum.
    Source: Marathon Air Museum

    The flight simulator is a particular hit with children. Another bonus? Admission is free.

    Marathon Air Museum Address: 9850 Overseas Hwy, Marathon, FL 33050

    The Turtle Hospital 

    Sea turtle at the turtle hospital.
    Turtle Hospital, Marathon, Florida Keys

    Since the 1980s The Turtle Hospital has been rescuing, rehabilitating, and releasing one of the planet’s most graceful sea creatures: the sea turtle.

    Phone ahead to reserve your spot on the 90-minute tour of their facilities.

    Sea turtle.

    Not only will you see a range of recovering sea turtles up close, but you’ll also learn about their anatomy, and the technology the hospital uses to perform procedures on ill or injured animals.

    Baby sea turtles.

    You’ll also understand why sea turtles matter in the greater environmental picture.

    Staff and volunteers continue the hospital’s work with passion and dedication.

    The Turtle Hospital Address: 2396 Overseas Hwy, Marathon, FL 33050

    The Dolphin Research Center

    Two dolphins.
    Photo by Samantha North, Courtesy of the Dolphin Research Center

    The Dolphin Research Center got its start back in the late 1950s, when a fisherman named Milton Santini opened Santini’s Porpoise Training School, with his beloved dolphin Mitzi. (Mitzi would go on to star in the 1963 classic film, Flipper.)

    Since those early days, this iconic Old Florida property has evolved into the modern Dolphin Research Center.

    Girl and a dolphin.
    Meet a Dolphin, Dolphin Research Center

    Both children and adults can experience their activities, which range from swimming with a dolphin to acting as a trainer for the day.

    The DRC also supports scientific research on dolphin cognition, behavior, and husbandry, and a number of different educational programs.

    Hotel on the water.
    Dolphin Research Center 

    You can easily spend hours here, so it’s well worth planning your visit with the help of their extensive website.

    Dolphin Research Center Address: 58901 Overseas Hwy, Grassy Key, FL 33050

    Pigeon Key and the Seven Mile Bridge 

    Vintage postcard of the highway between Pigeon Key and Key west.
    Vintage Postcard, Old Seven Mile Bridge, Courtesy of the Monroe County Library

    Of course, the attractions of Marathon Florida don’t end here. Beach lovers will want to plunk down in the sand at Sombrero Beach, while history buffs will want to take the ferry over to Pigeon Key.

    TIP: Buy tickets at the Visitors’ Center on Knight’s Key.

    Pigeon Key Tram.
    Source: Pigeon Key

    Tiny Pigeon Key is home to restored bunkhouses and office buildings from the construction days of Henry Flagler’s Overseas Railroad.

    Today, you can tour the museum and learn about the creation of this “railroad that went to sea.”

    And here you’ll also find one of the best views of the famous Seven Mile Bridge and “Old Seven,” the original.

    Seven mile bridge.
    Source: Island Jane Key West

    The soaring spans of the bridge against the blues of the ocean are an unforgettable sight. It’s just one more reason to add the Middle Keys to your Authentic Florida travel list.

    Pigeon Key bridge.
    The Seven Mile Bridge. Photo Courtesy of Florida Keys & Key West

    The islands of Marathon, located in the heart of the Keys mid-way between Key Largo and Key West, make for a memorable – and authentic – Florida getaway.

    About the Author

    Laura Albritton writes for her own island travel blog, Island Runaways. With co-author and historian Jerry Wilkinson, she recently completed a pictorial history entitled Marathon: the Middle Keys, which was published by Arcadia Publishing in December 2016.

    Laura is also a documentarian. You can read more: Florida Keys Film Tells Heartwarming Story.

    Seven mile bridge.
    Source: Zickie Allgrove

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