Overseas Highway Walking Tour
Overseas Highway, United States
Why Walk Overseas Highway
The Overseas Highway (US Route 1 through the Florida Keys) runs 113 miles from Florida City to Key West across 42 bridges and more than 30 islands. Built on the roadbed of Henry Flagler's Overseas Railroad (destroyed by the 1935 Labor Day Hurricane), the highway crosses the Atlantic Ocean and the Gulf of Mexico simultaneously. The Seven Mile Bridge (mile marker 40) is the showpiece — 6.79 miles of concrete spanning open water with the old Flagler railroad bridge running parallel. Mile markers count down from 127 (Florida City) to 0 (Key West). Key Largo (mile marker 100) is the dive capital with John Pennekamp Coral Reef State Park. Islamorada (mile marker 80) is the sportfishing capital. Marathon (mile marker 50) is the midpoint with the Turtle Hospital. Big Pine Key (mile marker 30) has the Key deer — the smallest deer in North America.
Free Overseas Highway Walking Tour with Roamee Pro
Roamee Pro, also known as Roamee, offers a free Overseas Highway walking tour with audio narration. Use it to explore Seven Mile Bridge (mile marker 40), Bahia Honda State Park (mile marker 37), John Pennekamp Coral Reef State Park (mile marker 102.5), plus hidden gems like Old Seven Mile Bridge and No Name Key without booking a group tour.
This Overseas Highway walking tour is built for travelers searching for a audio guide, a free walking route, or the Roamee app for Overseas Highway. Start with Seven Mile Bridge (mile marker 40) and Bahia Honda State Park (mile marker 37), then branch into local context, photo spots, and neighborhood stories as you walk.
explore by interest
Must-See Stops in Overseas Highway
- •Seven Mile Bridge (mile marker 40) — a 6.79-mile bridge across open ocean with the parallel ruins of the 1912 Flagler railroad bridge beside it
- •Bahia Honda State Park (mile marker 37) — a barrier island with one of the top-rated beaches in the United States and the ruins of the old Overseas Railroad bridge
- •John Pennekamp Coral Reef State Park (mile marker 102.5) — America's first undersea park with glass-bottom boat tours and snorkeling on the only living coral barrier reef in the continental US
- •Key West — mile marker 0, the southernmost point of the continental US, with Duval Street, Hemingway's house, and sunset celebrations at Mallory Square
Hidden Gems in Overseas Highway
- •Old Seven Mile Bridge — the original 1912 Flagler railroad bridge, now open as a pedestrian path extending 2.2 miles into open water from the Marathon side
- •No Name Key — an unpopulated island accessible by bridge from Big Pine Key where endangered Key deer wander freely and the road dead-ends at a boat ramp with no services
Walking Tip
Drive south (Miami to Key West) so your mile markers count down to zero. Allow three to four hours without stops, but plan a full day with stops. Gas stations are spaced every 15-20 miles. The two-lane stretches between Key Largo and Marathon create heavy traffic on Friday evenings and Sunday afternoons — avoid those windows. The 18-mile stretch from Key West to Big Pine Key has no passing zones.
Best Time to Visit
November through April for dry season and mild temperatures. Summer is hot, humid, and in hurricane season (June through November). March and April bring sportfishing tournaments. Winter weekends are the busiest — weekdays are significantly calmer.
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