Plan your stop
Useful details
There are no restrooms at the trailhead. Pigeon Key island admission, the train and guided tours are run separately by the Pigeon Key Foundation, which has its own listing (Pigeon Key & Old Seven Mile Bridge Tours). The old bridge is closed past Pigeon Key. Seven Mile Bridge repairs under way; check posted detours near Knights Key (KeysNews roadwork, Sep 23, 2026: https://www.keysnews.com/community/roadwork/roadwork/article_2e48f64c-55ef-49b9-9264-195919d670a0.html). Check trail conditions on https://www.floridastateparks.org/parks-and-trails/florida-keys-overseas-heritage-trail/experiences-amenities and parking details on https://visitfloridakeys.com/plan-your-trip/plan-book/itineraries/great-walks/seven-mile-bridge (Pigeon Key Foundation: https://pigeonkey.net/about/pigeon-key-visitors-center/).
On Marathon, at MM 47–60
Old Seven Mile Bridge (Knights Key Trailhead) sits in Marathon (Middle Keys, MM 47–60). The service hub of the Middle Keys, with an airport, hospital, marinas, boat ramps and plenty of dining. This listing is for public outdoor time, with parking, heat and wildlife rules checked first.
Other parks & beaches listings currently published on Marathon include Children's Rotary Park, Coco Plum Beach, Jesse Hobbs Park. Compare them on the island or category hub rather than assuming this listing is the only option.
What this record includes
- Directory category
- Parks & Beaches
- Island area
- Marathon (Middle Keys, MM 47–60)
- Mapped as
- parks & beaches
- Published address
- Overseas Hwy. just past Knights Key Blvd., Marathon, FL
- Official website on file
- Yes — confirm details there
- Mapped or source amenities
- Renovated 2.2-mile stretch, free to walk or bike, Picnic tables at the trailhead, 35-space parking lot, Florida Keys Overseas Heritage Trail segment
- Source
- Florida State Parks — Florida Keys Overseas Heritage Trail (Experiences & Amenities)
Confirm before you go
- Current hours, closures, fees and access rules on the linked source
- A working phone number — none is published on this listing
- Today’s hours — none are published on this listing
- No ratings or “best of” rank — this page does not score or rank places
How to use this listing
Old Seven Mile Bridge (Knights Key Trailhead) is a Florida Keys Overseas Heritage Trail segment in Marathon (Middle Keys, MM 47–60) for walking and biking.
Check current trail conditions with Florida State Parks before you go.
Listed amenities & features
- Renovated 2.2-mile stretch, free to walk or bike
- Picnic tables at the trailhead
- 35-space parking lot
- Florida Keys Overseas Heritage Trail segment
This listing was reviewed using Florida State Parks — Florida Keys Overseas Heritage Trail (Experiences & Amenities). The official website is the right place for menus, rates, reservations and hours. Directory text is a planning aid, not a live operations feed. Last reviewed on Oct 8, 2026 using Florida State Parks — Florida Keys Overseas Heritage Trail (Experiences & Amenities).
Business owner or traveler? Report an update →Claim or correct this listing