Seven Mile Bridge Marathon


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Seven Mile Bridge Marathon

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The Seven Mile Bridge Marathon

The Seven Mile Bridge, located in the Florida Keys, is an engineering marvel that connects Knight’s Key in Marathon to Little Duck Key, stretching over the shimmering turquoise waters of the Gulf of Mexico and the Atlantic Ocean. As one of the longest bridges in the world when it was completed in the early 1980s, the Seven Mile Bridge stands as a testament to human ingenuity and the adventurous spirit of the Florida Keys.

This iconic bridge is part of the Overseas Highway (U.S. Route 1), a scenic route that links the mainland of Florida to Key West. Spanning 6.79 miles (or roughly seven miles, hence its name), the bridge offers breathtaking views of the surrounding seascape, making it a popular drive for both locals and tourists. The experience of crossing the bridge is akin to gliding over the ocean, with expansive views of the endless horizon, dotted with small islands and patches of coral reefs visible through the clear waters.

History of The Seven Mile Bridge Marathon

The original Seven Mile Bridge, built in the early 1900s as part of Henry Flagler’s ambitious Overseas Railroad project, was a pioneering feat of its time. Although it no longer carries vehicular traffic, this historic bridge still stands parallel to the modern one and serves as a pedestrian and cycling path, offering a unique perspective on the bridge’s construction and the natural beauty of the area. The old bridge, now known as the Old Seven Mile Bridge, is a cherished landmark and a favorite spot for fishing, jogging, and leisurely walks.

The construction of the modern Seven Mile Bridge was completed in 1982, replacing the old bridge as the main thoroughfare. Designed to withstand the harsh conditions of the Florida Keys, including strong currents, high winds, and hurricanes, the bridge was built using advanced engineering techniques and materials. Its sturdy structure and graceful arches are not only functional but also aesthetically pleasing, blending harmoniously with the surrounding environment.

The bridge plays a crucial role in the connectivity and economic vitality of the Florida Keys, facilitating the movement of residents, tourists, and goods between the islands. It is a vital link in the chain of the Keys, ensuring that the unique culture, lifestyle, and natural beauty of the region are accessible to all who venture along this stunning route.

The Seven Mile Bridge Wildlife

One of the most captivating aspects of the Seven Mile Bridge is the array of wildlife that can be observed in the surrounding waters. Dolphins, sea turtles, and a variety of fish are often seen swimming near the bridge, while seabirds soar overhead. This abundance of marine life adds to the magical experience of crossing the bridge, making it a memorable journey for nature enthusiasts.

Each year, the Seven Mile Bridge Run is held, attracting runners from around the world to compete in this unique event. The run offers participants the rare opportunity to traverse the entire length of the bridge on foot, enjoying the spectacular views and the invigorating sea breeze.


In summary, the Seven Mile Bridge in Marathon is more than just a vital transportation link; it is an iconic symbol of the Florida Keys. With its stunning views, historical significance, and engineering brilliance, the bridge provides an unforgettable experience for all who cross it. Whether you’re driving, biking, walking, or running, the Seven Mile Bridge offers a breathtaking journey over the waters of the Florida Keys, embodying the spirit of adventure and the beauty of this unique region.

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