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Seven Mile Bridge, Marathon, FL

Photo: Ebyabe, CC BY-SA 3.0, via Wikimedia Commons. Cropped and resized.

SightseeingIconicOutdoor AdventureFree

Seven Mile Bridge

US 1 between Knight's Key and Little Duck Key · Marathon, FL

Why you should go…

The Seven Mile Bridge carries US 1 for 6.79 miles over open water between Knight's Key in Marathon and Little Duck Key in the Lower Keys. Beside it runs the original span, built from 1909 to 1912 for Henry Flagler's railroad. A restored 2.2-mile section of that old bridge reopened in January 2022 as a path for walkers and cyclists, leading to tiny Pigeon Key, once a railroad work camp. Each April the bridge hosts the Seven Mile Bridge Run.

  • #bridge
  • #florida keys
  • #scenic drive
  • #pigeon key
  • #walking path

Good to know

General sightseeing guidance

Habits that pay off across this whole category, not rules for this one venue. Always check the official site for the specifics.

  • The forecast is part of the ticket

    Haze, low cloud, and rain flatten a view. Clear-day visits are worth rearranging your plans for.

  • Golden hour sells out first

    Sunset slots at observation decks and cruises are the first to go, so book those further ahead.

  • Dress a layer warmer

    It is always breezier up high and out on the water than it feels at street level.

  • Timed entry is common

    Plenty of landmarks release tickets in windows rather than at the door, so check before you walk over.

What's around here?

The closest stops to Seven Mile Bridge, ordered by straight-line distance. A few more like it, plus some different kinds of fun so you can build a full day.

  • Sport & Outdoor
    Outdoor Adventure

    Bahia Honda State Park

    Under $25

    Swim and snorkel off white-sand Keys beaches, then walk up the old Flagler railroad bridge for a view over the islands.

    5.4 mi awaySwitch it up: Sport & Outdoor

  • Sightseeing
    Iconic

    Southernmost Point Buoy

    Free

    Pose beside the striped concrete buoy in Key West that claims the southernmost point of the continental U.S., 90 miles from Cuba.

    40 mi awayMore like this

  • Sightseeing
    Iconic

    Duval Street

    Free

    Walk Key West's main street from the Gulf to the Atlantic past bars, galleries, shops and Victorian mansions.

    40 mi awayMore like this

  • Museums
    Iconic

    The Ernest Hemingway Home and Museum

    Under $25

    Tour the Key West house where Hemingway wrote in the 1930s and meet the six-toed cats that roam its gardens.

    40 mi awaySwitch it up: Museums

  • Tours
    Iconic

    Historic Tours of America

    $50+

    Hop on hop off Old Town Trolley Tours and themed historic tours of Key West.

    40 mi awaySwitch it up: Tours

  • Sightseeing
    Iconic

    Mallory Square

    Free

    Join the nightly Sunset Celebration on Key West's waterfront plaza, with street performers, craft vendors and food carts.

    40 mi awayMore like this