Seven Mile Bridge
Marathon, FL
Almost seven miles of open water on the Overseas Highway. The old bridge alongside is partly open to walkers.
The current bridge was built between 1978 and 1982, is 10.9 km (6.8 miles) long and consists of 440 spans of precast, prestressed concrete. Over Moser Channel it leaves 20 m (65 feet) of clearance for boats. Alongside stands the old bridge that Henry Flagler built from 1909 to 1912 for his Overseas Railroad; after the 1935 hurricane it was converted into a highway.
A 3.5 km (2.2-mile) section of the old bridge out to Pigeon Key has been restored and has been open to walkers and cyclists since January 2022. That makes about 7 km (4.4 miles) round trip; allow roughly an hour and a half on foot. Along the way you will often see rays, sea turtles, dolphins and pelicans. Because the bridge runs almost east–west, it is good for both sunrise and sunset. Next to the bridge in Marathon there is a free parking lot for up to 35 vehicles. A train also runs to Pigeon Key and its museum three times a day.
- Nearest town
- Marathon, FL
- Category
- Scenic viewpoints
- GPS
- 24.7050, -81.1426
- Editor's pick
- ★
Hours, fees and access change. Confirm with the operator or park before you go.
Good to know
Best time to go
The most pleasant months are usually November–March. Still fine, with some compromises, in April–May and September–October. Hot in June–August. (Estimate from long-term temperature averages, terrain and pass seasons)
Featured in these trip guides
Nearby
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Campsites nearby
- Marathon Marina and RV ResortMotorhome stopover2 mi from Seven Mile Bridge · 9 pitchesMotorhomesElectricityDrinking waterWi-Fi
- Bayside CampgroundCampsite9 mi from Seven Mile BridgeTentsCaravansDrinking waterToiletsDogs allowed
- Curry Hammock State Park CampgroundCampsite10 mi from Seven Mile Bridge · 28 pitchesTentsCaravansMotorhomesElectricityDrinking waterShowersToiletsWaste disposal
- Royal Palm RV ParkMotorhome stopover13 mi from Seven Mile BridgeMotorhomesElectricityDrinking waterWaste disposalWi-Fi
- Kampgrounds of America - Sugarloaf Key / Key WestMotorhome stopover24 mi from Seven Mile BridgeTentsCaravansMotorhomesElectricityWi-Fi
- Lazy Lakes RV ResortMotorhome stopover24 mi from Seven Mile BridgeTentsMotorhomesElectricityDrinking waterWaste disposalWi-Fi
All campsites in Florida · Campsite data: © OpenStreetMap contributors, ODbL 1.0 · Updated October 3, 2026
FAQs
Where is Seven Mile Bridge?
Seven Mile Bridge is in Marathon, FL, at GPS 24.7050, -81.1426. It is about 13 mi from Big Pine Key.
Can you camp near Seven Mile Bridge?
Yes. The nearest campsite listed in OpenStreetMap is Marathon Marina and RV Resort, about 2 mi away; within 25 mi there are 16 campsites and motorhome stopovers.
Which road trips pass Seven Mile Bridge?
Seven Mile Bridge is a stop on these CampingSpirit trip guides: The Overseas Highway to Key West and Turquoise to the Horizon – Along the Overseas Highway to Key West.
What is there to see near Seven Mile Bridge?
Places worth a stop nearby: Bahia Honda State Park Campground (9 mi), Southernmost Point Buoy (43 mi), Coral Castle (70 mi) and Shark Valley, Everglades (76 mi).
When is the best time to visit Seven Mile Bridge?
The most pleasant months are usually November–March. Still fine, with some compromises, in April–May and September–October. (Estimate from long-term temperature averages, terrain and pass seasons)