Where you are in the Keys
Traveling south on the Overseas Highway, you reach the Seven Mile Bridge after passing through Marathon. The modern roadway leads toward Little Duck Key and the Lower Keys. The historic bridge runs beside it, but the recreational access most visitors mean by “walk Old Seven” is on the Marathon side, toward Pigeon Key.
Do not enter a bridge shoulder as a casual viewpoint. U.S. 1 is an active highway and stopping rules matter. If your goal is to walk, cycle or photograph the old span, use a designated parking area and the signed entrance rather than improvising a stop on the current road bridge. The Florida Keys tourism guide describes the Old Seven access near Knights Key Boulevard and notes that parking is limited.
Crossing south
Stay in your lane and enjoy the broad water views as part of the journey. Plan any stop before or after the crossing, on land and in a legal parking area.
Old Seven access
Allow enough time for the return trip. The walk to Pigeon Key is about 2.2 miles each way, exposed to sun and wind.
Bahia Honda
Bahia Honda State Park lies farther south and offers a separate historic-bridge landscape. It can reach capacity; check the state park's current notice.
A simple decision checklist
- Are you driving through, walking Old Seven or entering Pigeon Key? Each has a different access pattern.
- Have you checked current weather, bridge notices and island visitor information?
- Can everyone in your group manage an exposed out-and-back walk?
- Is your parking plan legal and realistic if the small lot is full?
If the answer to the walking questions is uncertain, a shorter out-and-back on the old span still gives you a sense of the setting without committing to the full island distance. Read Old Seven Mile Bridge for the history and route, or Pigeon Key for the island context.