The Keys Crossing The Trail US 1 · MM 113 → MM 0
A trail down the Overseas Highway
The Keys Crossing

One hundred and thirteen miles of two-lane laid across open water, from Key Largo to the end of the road. The green mile markers count you down the whole way — and there is a story under every number.

01
Chapter I

The Road Over the Sea

Forty-two bridges tie seventeen hundred islands to the mainland. For long stretches the highway is the only dry thing in sight — a ribbon of asphalt between the Atlantic and the Gulf, driven at the speed of the car in front of you, best at the hour the water turns to gold.

Begin US 1 North · the green sign at Mile 0, Key West
Two generations of bridge over the shallows · Bahia Honda
The last light on the two-lane · heading south
Mile marker to mile marker

Ride the countdown →

KEY LARGO
The African Queen still steams · MM 100, Key Largo
ISLAMORADA
“Live Simply,” in Toilet Seat Cut · near MM 90
MARATHON
Under the old span · Pigeon Key, MM 45
BIG PINE KEY
Drive slow — deer crossing · Big Pine Key
MILE ZERO
Ninety miles to Cuba · the buoy at the end, Key West
02
Chapter III

What the Water Took

Before the highway there was a railroad — Flagler’s Overseas Railroad, finished in January 1912 by convict crews and recruited immigrants working over open water. On Labor Day 1935 a Category 5 hurricane put two-hundred-mile-an-hour winds over the middle Keys. The rescue train sent down for the veterans building the road’s bridges was swept off the track; more than four hundred people died, two hundred and sixty of them veterans. The railroad never ran again.

03
Chapter IV

The Road That Rose

The state bought the drowned right-of-way for $640,000 and paved it. The old rails came up and went back down as guardrails. On March 29, 1938, Route 1 reached Key West — a toll road then, a dollar a car and a quarter a passenger, collected at Pigeon Key. People have been driving it for the light ever since.

The Long Trestle, when it carried trains · Long Key to Lower Matecumbe
The same bed, carrying cars · the first highway years
KEY WEST end of the road
The drive only moves when you do.
What the map says
0 Stops on this trail
0 Miles of road over the sea
0 Bridges holding it together
Every mile marker on the map

One road down.
The same road back.

The light is best near the water

Mile zero is waiting.

Remember a stop the countdown passed? It belongs on the map.