Just as it was when it was first built, the Old Seven Mile Bridge is a sensation.
After being closed for more than five years for restoration, the Old Seven Mile Bridge reopened in 2022, and immediately drew hordes of people to hike, bicycle, skate, push a stroller, walk a dog or jog its 2 mile length.
Its 35 parking spaces are nearly always full, even on weekdays, with cars often waiting for someone to leave.
There is a steady stream of people coming and going and taking pictures; the bridge is now far busier than in years before the closure.
Many visitors are also touring Pigeon Key, the 5-acre island at the end of the bridge, a historic landmark that tells the fascinating story of the bridge’s construction. (See more below.)
The bridge is located at Mile Marker 47 in Marathon and only 2.2 miles of it are accessible. The new Seven Mile Bridge is immediately adjacent on the ocean side.
What makes the Old Seven Mile Bridge so special?
Old Seven, as it is nicknamed, stands out in the Keys for two reasons — its history (it was once called the Eighth Wonder of the World) and the natural beauty you experience from it.
When we walked and biked the bridge in January, on one lucky bike ride, we paused to gaze into the water and saw three huge spotted rays at one point and a sea turtle and a large nurse shark at another. The many visitors were a help. We noticed people gathering to look down and took advantage of their sharp eyes.
Even without these wildlife sightings, the view from the bridge is spectacular – so many shades of blue, those dramatic Florida clouds, boats zipping underneath, fishermen moored nearby, the elegant new bridge in the distance, the pelicans, gulls, magnificent frigate birds, osprey and other birds.
The history of the Old Seven Mile Bridge and Flagler’s Overseas Railroad
The Old Seven Mile Bridge is closely tied with Florida’s history — Henry Flagler’s railroad down the east coast of Florida is what opened the state to the world. For better or worse, Florida is what it is because of Henry Flagler.
A very rich old man by the time he fell in love with Florida, Flagler kept extending his railroad farther and farther down the Atlantic Coast. When he decided to extend the railroad over the water to Key West, Flagler’s men told him while it could be done, they didn’t recommend it — its tremendous cost could never be recovered.
They were right.
Flagler’s Overseas Railroad, the first land route from Miami to Key West when it opened in 1912, was a financial failure and then it became a downright disaster.
A devastating 1935 hurricane brought 200 mph winds and a 17-foot storm surge, washing away miles of railroad at Islamorada. Flagler’s bankrupt Florida East Coast railway sold the whole right-of-way to the state for one-seventh what it cost Flagler to build the railroad. (Flagler had died a year after the railroad opened.)
The Old Seven Mile Bridge was easily converted by the state of Florida to an automotive bridge — that’s the surface that was just restored — and the Overseas Highway opened in 1938.
For 44 years, until the adjoining new bridge opened in 1982, the Old Seven Mile Bridge was the only road cars could take to Key West. It was 22 feet wide, a single lane in each direction with no shoulder at all.
Visiting the Keys between 1978 and 1982, I vividly remember it as a spectacularly beautiful but white-knuckle ride. When you experience how narrow it is first-hand, you will know what I mean.
Rambler tip: When you visit the old bridge, be sure to notice the guardrails. Shiny new ones safely line the bridge, but on the outer side are the rusting rails of the original Flagler railroad. When the bridge was converted for cars, the old rails were simply repurposed as guardrails for the new roadway – and they’re still there.
Visiting the Old Seven Mile Bridge
Old Seven is a great stop on a trip through the Florida Keys, but parking is likely to be an issue. While right now the lot remains full or nearly full at most times, visitors don’t necessarily stay long, so the spaces turn over fairly quickly.
Bicyclists can park north of the bridge in various places in Marathon and take the excellent bike trail on the bay side of the road right to the bridge.
There is a little street parking on the other side of US 1, just beyond the Sunset Grille and Raw Bar. What makes this parking viable is that there is now a scenic walkway under the highway between that restaurant and the park at the base of the Old Seven Mile Bridge. (Or have a meal at the Sunset Grille and then take a walk on the bridge afterwards.)
Common questions about the Old Seven Mile Bridge
Are there restrooms at the Old Seven Mile Bridge? Nope, and they are very much needed. Some plans are underway to add them.
Can you fish on the Old Seven Mile Bridge? No, and with the walkers and bicyclists, it’s clear there wouldn’t be room for fishing. You can fish from the park at the base of the bridge on the bay side.
Can I use an electric bike on the Old Seven Mile Bridge? There is a 15 mph speed limit. I did see electric bikes using the bridge.
Can I walk my dog on the Old Seven Mile Bridge. There is no signage forbidding it and I saw plenty of dogs.
Can I picnic near the bridge? Yes! There are four picnic tables that remain from the earlier park at the base of the bridge and four new picnic tables under a roof. These tables have a beautiful view overlooking the bay. Without restrooms nearby, however, they aren’t perfect spots for a meal.
Can I bike or walk to Pigeon Key? Absolutely. I have more about visiting Pigeon Key below.
Can I take my own boat to Pigeon Key? Yes. You can tie up to the dock if you bring your own boat. Admission cost remains the same. Call the Visitors Center to pay prior to arrival. You can also pay via cash or credit card with one of the tour guides upon arrival.
When was the Old Seven Mile Bridge built? Old Seven was built between 1908 and 1912 and as many as 400 workmen lived on Pigeon Key during its construction.
Did they blow up that section of the Old Seven Mile Bridge for a movie? No, it only looked that way. Old Seven has appeared in several films, most famously the 1994 True Lies with Arnold Schwarzenegger, where the old bridge is shown being destroyed by missile strikes. The explosion was done on an 80-foot model.
Where can I rent a bike to bicycle on the Old Seven Mile Bridge? Marathon Bike Rentals delivers bikes to hotels or homes in the area and Bike Marathon rents a variety of bikes at 2994 Overseas Highway. Some hotels and resorts loan or rent bikes too.
Visiting Pigeon Key: Where the Old Seven Mile Bridge started
Few history lessons are as beautiful as this one: A visit to Pigeon Key, a picturesque little island surrounded by dazzling blue water in the middle of the Old Seven Mile Bridge.
You arrive at Pigeon Key on a cute blue and yellow train/tram and get a guided tour that includes a few of its 11 historic buildings. Pigeon Key housed the workers who built the Seven Mile Bridge from 1908 to 1912.
The Seven Mile Bridge and Pigeon Key’s fascinating history are told through displays and artifacts in its museum.
There’s more than history on Pigeon Key. Visitors can bring their lunch and picnic. You are encouraged to stay after the tour and snorkel in the clear waters off Pigeon Key’s dock.
- Tours of Pigeon Key are at 10 a.m., noon and 2 p.m. The tours lasts about an hour. To visit Pigeon Key, go to the visitor center located at 1090 Overseas Hwy Marathon, FL 33050, Mile Marker 47.5 bayside.
- Entrance price is adults $25; kids 4-12 are $20; 3 and under free.
- If you walk or bike to Pigeon Key: You can book your tour online or by calling 305-743-5999. Tours start at the yellow picnic tables on the south side of the Bridge Tender’s building. (Look for the umbrellas.) Arrive 10 minutes prior to tour time, which is 10 a.m., noon and 2 p.m. Admission is the same.
- Tickets can be purchased on the same day in-person or you can reserve your spot over the phone if you have a time and date preference.
- Here’s a Florida Rambler guide to visiting Pigeon Key.
The $77 million project to save the Old Seven Mile Bridge
Saving Old Seven had been a major cause in the Keys and in 2014, three levels of government came together to fund a major restoration project. Under the plan, the county, the City of Marathon and the Florida Department of Transportation all contribute. FDOT pays $57 million over a 30-year period; Monroe County pays $14 million and the City of Marathon pays $5 million.
With the 2.2 mile section of the bridge refurbished, it can hold 17-ton vehicles, such as fire trucks. The bridge is limited to trams going to Pigeon Key, pedestrians, bicyclists and emergency vehicles.
More about the Old Seven Mile Bridge
- Jerry Wilkinson’s detailed history of the Overseas Railroad.
- Friends of Old Seven, a non-profit committed to preserving the bridge.
Resources for planning a Florida Keys vacation
- Mile marker guide with dozens of stops to help make the most of your drive south.
- Florida Keys Overseas Heritage Trail: The best sections to bike
- Florida Keys wildlife: Places to see animals
- Tiki bars: Soak up the Keys atmosphere
- 12 great kayak outings in the Keys
- Top 10 pit stops on Overseas Highway
- Best beaches in the Florida Keys
Other nearby things to do in the Upper and Middle Keys
- Indian Key: Kayak into history
- Islamorada emerging as hub with new museum, breweries
- Feed the tarpon at Robbie’s Marina
- Sea Turtle Hospital in Marathon
Many readers have written to ask: Can you bicycle across the new Seven Mile Bridge?
You could only do this on the new bridge — I wouldn’t do it but, then, I’m a recreational bicyclist who is looking for stress-free, safe trails. It is not recommended for that kind of ride!
Many bicyclists do it. There’s about a five-foot lane for bikes and the bridge is mostly flat, with about one-mile at the center elevated, according to a bicyclist who has written about it. Here’s a section of her account on pedaling the length of the Keys.
The new bridge, by the way, is actually 6.765-miles long, not quite seven miles.
Here’s more about the Florida Keys Overseas Heritage Trail. If you are bicycling in the Keys and want to skip crossing the Seven Mile Bridge, Marathon taxis now have bike racks and can shuttle you and your bike across the bridge.
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The information in this article was accurate when published, but changes may occur.
The author, Bonnie Gross, travels with her husband David Blasco, discovering off-the-beaten path places to hike, kayak, bike, swim and explore. Florida Rambler was founded in 2010 by Bonnie and fellow journalist Bob Rountree, two long-time Florida residents who have spent decades exploring the Florida outdoors. Their articles have been published in the Sun Sentinel, the Miami Herald, the Orlando Sentinel, The Guardian and Visit Florida.