Seven Mile Bridge
Iconic Bridge · Marathon, Florida
The longest span on the Overseas Highway, carrying US 1 for nearly seven miles across open water between Marathon and the Lower Keys with the Atlantic on one side and the Gulf on the other. Alongside it stands the original — Henry Flagler's 1912 railroad bridge, abandoned since the 1935 hurricane, with a restored two-mile section now open to walk out to Pigeon Key.
Overseas Highway, Mile Marker 47, Marathon, Florida, 33050, United States
The highway is open 24 hours year-round. The restored old-bridge walking section is open daily during daylight hours.
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