Seven Mile Bridge

Stretching across brilliant blue water in the Florida Keys, the Seven Mile Bridge is one of the state’s best-known landmarks. Located in the Middle Keys, the bridge links Knight’s Key in Marathon with Little Duck Key along the Overseas Highway (U.S. 1). For many travelers, crossing it is a highlight of the drive between the Upper and Lower Keys, thanks to its expansive views, famous history, and close connection to the old railroad-era bridge beside it.

A Tale of Two Bridges

The Seven Mile Bridge experience is really about two neighboring structures:

The Old Seven Mile Bridge: Built in the early 1900s as part of Henry Flagler’s Overseas Railroad, this historic span is one of the most recognizable remnants of the railway to Key West. Today, a restored section from Knight’s Key to Pigeon Key is open for walking and biking, with access and operations subject to current conditions and management policies.
The Modern Seven Mile Bridge: Completed in 1982, this newer concrete span carries vehicle traffic on U.S. 1 and delivers one of the most scenic drives in Florida.

Things to Do at the Seven Mile Bridge

Drive Across the Bridge
The Seven Mile Bridge is a signature stretch of the Overseas Highway:
- Take in wide-open views of turquoise water, passing boats, and the historic bridge nearby.
- On clear days, passengers may spot rays, sea turtles, dolphins, or seabirds in the waters around the bridge.
- Enjoy the feeling of traveling across open water in one of the most distinctive landscapes in the Keys.
Walk or Bike the Old Seven Mile Bridge
A restored public section of the old bridge offers a memorable way to experience the area at a slower pace:
- Walk or bike the approximately 2.2-mile stretch from Knight’s Key toward Pigeon Key.
- Enjoy unobstructed views of the water and the modern bridge running parallel in the distance.
- Check current hours, admission requirements, and weather-related access updates before visiting.
Visit Pigeon Key
Pigeon Key is a small island with a big place in Florida Keys history:
- Explore restored buildings connected to the construction era of the Overseas Railroad.
- Learn about the workers and families who once lived on the island and supported the railroad project.
- Depending on current operations, visitors may reach the island by walking the old bridge or by scheduled transportation options.
Photography and Sightseeing
The Seven Mile Bridge is a favorite stop for photographers and road trippers:
- Capture panoramic views of the bridge, surrounding water, and distant Keys islands.
- Sunrise and sunset can be especially striking, with changing colors reflected on the water.
- For safety, use designated parking and pedestrian areas rather than stopping on the active highway bridge.

Additional Activities

Fishing Nearby
The waters around the Seven Mile Bridge are well known among anglers, but access rules matter:
- Look for legal fishing access points in the surrounding Marathon and Lower Keys area rather than attempting to stop on U.S. 1.
- Common catches in the region may include snapper, tarpon, and other Keys species, depending on season and conditions.
Wildlife Watching
The bridge corridor offers excellent views over open water:
- Watch for pelicans, ospreys, frigatebirds, and other coastal birds overhead.
- With a little luck, you may also spot dolphins, sea turtles, or schools of fish in the channels below.

Amenities & Facilities

Parking Areas: Designated parking is typically available near the Old Seven Mile Bridge entrance on the Marathon side, though spaces can fill during busy periods.
Restrooms: Services at the bridge itself are limited; additional facilities may be available at Pigeon Key during open hours and at nearby Marathon businesses, parks, or attractions.
Bicycle Rentals: Rental options are available in Marathon and elsewhere in the Keys for visitors who want to explore the old bridge by bike.
Visitor Information: Pigeon Key staff and regional visitor resources can provide current details on access, tours, and nearby attractions.

Accessibility

The Seven Mile Bridge area offers some accessible features, but conditions vary by activity:

Old Bridge Path: The restored public section is generally paved and relatively flat, but it is long, exposed, and has very little shade.
Parking: Accessible parking may be available near the Old Seven Mile Bridge access area.
Pigeon Key Access: Transportation and accessibility options can change, so it’s best to confirm current arrangements directly with the operator before your visit.

Tips for Visiting the Bridge

Drive During Daylight: Daytime offers the best visibility for scenery, wildlife spotting, and photos from approved areas.
Bring Water and Sunscreen: If you plan to walk or bike the old bridge, be prepared for strong sun, heat, and wind.
Visit at Sunrise or Sunset: Early morning and late afternoon often provide the most dramatic light.
Check Conditions Before You Go: Access to the Old Seven Mile Bridge, Pigeon Key, and special events can vary by date, weather, and maintenance schedules.
Do Not Stop on the Highway Bridge: Use designated parking areas if you want to sightsee, walk, or take photos.

Vicinity of the Seven Mile Bridge

Nearby Attractions

Sombrero Beach: A family-friendly beach in Marathon with soft sand, swimming, and picnic facilities.
Crane Point Hammock Museum and Nature Center: Explore nature trails and learn more about the Keys’ ecosystems and history.
Bahia Honda State Park: One of the Keys’ most popular parks for beaches, snorkeling, and outstanding views.
The Turtle Hospital: Learn about sea turtle rescue, rehabilitation, and conservation in Marathon.

Why Visit the Seven Mile Bridge?

The Seven Mile Bridge is more than a roadway between islands. It is one of the defining experiences of a Florida Keys trip, combining ocean views, engineering history, and easy access to places like Pigeon Key. Whether you drive the modern span, walk the restored section of the old bridge, or pair your stop with nearby beaches and attractions, it remains one of the most memorable sights on the Overseas Highway.

For current Old Seven Mile Bridge and Pigeon Key access information, visit Pigeon Key Foundation . For regional trip-planning information, see Florida Keys & Key West .