Driving the Florida Keys: From Miami to Key West on the Overseas Highway
From Miami to Key West on the Overseas Highway
Published on: July 24, 2026
The best excuse to slow down you'll ever find. There are road trips with a destination, and there are roads where the journey is the whole point. The Overseas Highway is essentially a floating road spanning 113 miles, with almost 19 miles of bridges along the route. This isn't a drive that needs military planning or precision; it's an unhurried escape through some of the South's most eccentric and off-the-wall areas. It's Hemingway drinking at noon; it's America unplugged.
This is a drive begging for a convertible. If ever you needed an excuse to have the top down and the wind in your hair, this is it.
Miami to Key Largo
Before you hit the road, make some time to explore Miami. The Magic City has a fast-paced, sun-soaked vibe by day, before shifting into a glamorous, neon party at night. Don't miss South Beach, Little Havana and Downtown before leaving, and if you want to experience true Miami luxury, take to the waters that you'll soon be cruising over and look into a premium vessel charter to cruise Biscayne Bay in style.
Key Largo
US Route 1 South (The Overseas Highway) leaves Miami and conveniently delivers you to Key Largo an hour later. However, a more fitting route for such a journey is to take Card Sound Road (State Road 905A) for the first 20 miles, bypassing the main highway in favor of a more remote drive through mangrove forests and the Crocodile Lake National Wildlife Refuge. While driving through the refuge, please remember that you may not pull over to explore. It's completely closed to the public and must be respected, not least to prevent yourself from becoming lunch for a hungry croc.
Note: A small toll is charged for access to Card Sound Road. Currently priced at $2.13 for SunPass/Interoperable Transponders like E-ZPass, or $3.18 for toll-by-plate (double check current pricing). Your rental company will often pay this and pass the charge on to you, usually with an admin fee attached.
Arrival in Key Largo, the first and longest of the Florida Keys, is where the unique atmosphere of the Florida Keys really begins to kick in. It's worth making time for:
- John Pennekamp Coral Reef State Park: The first undersea park in the United States. Hop onto a glass-bottom boat tour to view the reef, or get closer by renting a kayak or booking a snorkeling trip to see the famous Christ of the Abyss statue.
- Mrs Mac's Kitchen: A legendary roadside stop. It's non-negotiable to treat yourself to a slice of Key Lime Pie.
The Middle Keys: Islamorada to Marathon
As you leave Key Largo, the highway narrows, and the road is cradled by the Atlantic Ocean to your left and the Gulf of Mexico to the right. You are now in the Middle Keys, where old-school Floridian charm meets a sport fishing mecca.
Islamorada
Islamorada is a stunning, upscale and relaxed collection of six islands known as the “Sportfishing Capital of the World”. If you've ever wanted to catch a giant Marlin or Sailfish , this is the place to do it. Don't miss:
- Robbie's Marina: An unmissable, quirky roadside institution. Buy a bucket of bait and feed the massive, wild tarpon directly from the dock by hand. Beware: Pelicans will try to steal your bait.
- Morada Way Arts & Cultural District: A great spot to stretch your legs, explore independent galleries, and pick up local, handmade surf art.
Marathon
Marathon is a family-friendly boating paradise located right in the center of the island chain.
- The Turtle Hospital: A working veterinary hospital dedicated to the rehabilitation of injured sea turtles. The guided tours here are fantastic.
- Sombrero Beach: A beautiful, shaded white-sand beach that is a favorite local secret for a quiet swim. Be aware that street and lot parking used to be free at Sombrero Beach but as of now charges $5 per hour for the first 2 hours and $2 per hour thereafter. Don't be caught out and risk a steep ticket; pay immediately at the park kiosks.
The Road to the Horizon: Seven Mile Bridge to the Lower Keys
Seven Mile Bridge is arguably the highlight of the Overseas Highway. An asphalt ribbon over the water, this masterpiece of engineering gives you the sense of flying over a turquoise desert. To your right, you'll see the old railway bridge running alongside, mainly used by walkers, cyclists and the odd ambitious jogger. Stopping on the bridge is strictly forbidden for safety reasons, so photos should be taken by your passengers. A dashboard phone mount makes it easy to navigate the Overseas Highway while keeping your phone secure and within view.
Big Pine Key & Bahia Honda
Beyond the bridge, the Lower Keys have a quieter, wilder feel as nature reclaims your attention after the drama of the crossing.
- Bahia Honda State Park: Home to what some consider the most beautiful beach in the entire Keys, framed by the dramatic remains of the old railroad bridge.
- The National Key Deer Refuge: Slow down through Big Pine Key to catch a glimpse of the endangered Key Deer, adorable miniature deer unique to the area. Roughly the size of a large dog, these cute Bambis are happily increasing in numbers again.
The Last Stop: Key West
As you begin the approach to Key West, the air grows heavier with the heady scent of blooming hibiscus mixed with salty mud. Banyan trees shade the horizon from view, and feral chickens cluck and peck along the roadside. When you reach the quirky island itself, park the car, as Key West is a city that deserves to be explored on foot.
- Duval Street: The center of Key West's nightlife. Famous for its historic saloons, live music, and legendary bar crawls. Think Bourbon Street in New Orleans crossed with the Las Vegas Strip deposited into the Conch State with a neon-lit yet laid-back atmosphere.
- The Ernest Hemingway Home and Museum: The beautiful Spanish Colonial estate where the author lived, wrote, and shared his home with his famous six-toed cats (whose descendants still roam the property).
- Mallory Square Sunset Celebration: The perfect way to round off your journey. Locals and visitors gather nightly to applaud as the sun sinks into the Gulf of Mexico. Street performers give this ritual a sense of being an event rather than just another sunset.
Distances and Where to Stay
| Segment | Distance | Drive Time | Suggested Overnight |
|---|---|---|---|
| Miami to Key Largo | 60 miles | 1.25 hours | Key Largo |
| Key Largo to Islamorada | 17 miles | 30 mins | Islamorada |
| Islamorada to Marathon | 30 miles | 45 mins | Marathon |
| Marathon to Key West | 50 miles | 1.25 hours | Key West |
Final Thoughts
The Overseas Highway isn't an “epic” road trip. It's an ocean voyage taken by car. It's a high-speed road that forces a slow-motion state of mind. It induces a psyche in which you lose your sense of forward velocity and, rather than grinding out miles on tarmac, you skim across the endless turquoise ocean. Every mile covered sheds more of the mainland from your shoulders, and your ultimate destination isn't a new city or state; it's the absolute end of the line.