The Florida Keys are connected to mainland Florida by U.S. Route 1 on the Overseas Highway. The highway includes an impressive series of bridges crossing the shallow waters between the many islands. Route 1 starts at the Canadian border in northern Maine and continues south for more than 2,000 miles into Florida. The Overseas Highway comprises the last 113 miles to the end of Route 1 at Key West.

map of Overseas Bridge in Florida
Overseas Highway.

The longest crossing is the stunning Seven Mile Bridge, connecting the city of Marathon on Knight’s Key to Little Duck Key and Big Pine Key. It was built in 1912 originally as a rail bridge. After the Labor Day Hurricane of 1935, with the failure of the railroad, the bridge was sold to the state of Florida. The structure was converted to a highway bridge and then replaced by a new structure in 1982.

Most of the original bridge remains in place. Its east end has been reused as a pedestrian and bike path from Knight’s Key to a park on Pigeon Key. To the west, it is mostly no longer in use. At least, not officially.

photo of the Original Seven Mile Bridge plantgrowsave.org
Original Seven Mile Bridge.

photo of Seven Mile Bridge: old bridge (top) and new bridge. Looking east. U.S. Dept. of Transportation
Seven Mile Bridge: old bridge (top) and new bridge. Looking east.

The west end of the original bridge featured a series of concrete closed spandrel wall arches. The space between the walls was filled with sand and miscellaneous material, and the roadway was paved on top. When the original bridge was abandoned, parts were converted to a pedestrian walkway. Apparently, the fill was also available for other, unplanned uses.

At some point, a seed made it to the deck of the old bridge. Some say the seed was carried by a seagull’s droppings, and the seed found its way into the fill. An evergreen tree of the genus Casuarina (also known as an Australian Pine, but it is not actually a pine tree) took root in the sandy soil about a mile and a half offshore of Little Duck Key. Usually, an abandoned bridge deck crossing a saltwater bay is not a good environment for a tree. But the Australian Pine that sprouted was a hardy plant. This type of tree grows well in salty and warm environments, and it does fine in sandy soil. The old bridge deck was well-watered with frequent and distributed rain all year long.

Travelers witnessed the peculiar sight of a random tree growing on the bridge. Local residents named it “Fred,” which is an acronym “For Real Enjoyment Driving.” It is not clear whether the tree-namers picked “Fred” and back-figured the acronym, or vice versa (See Note 1 below).

Fred the Tree provides a visual milepost for travelers. It is about halfway along the Overseas Highway between the mainland and Key West. The tree has been remarkably durable. It grows by itself with no maintenance. In its exposed location, it has survived several hurricanes, such as direct hits from Hurricanes Irma and Ian. Fred the Tree’s resilience has been inspirational. Keys residents refer to Fred’s strength when encountering and overcoming adversity.

During the December holiday season, local volunteers travel out the abandoned bridge section to hang decorations on Fred. The holiday ornaments provide a different view than what is usually seen on Christmas. Instead of a snowy landscape outside with chestnuts roasting on an open fire, Fred the Tree stands resilient and alone in a bright blue, tropical expanse, with ornaments hanging from his pseudo-piney branches.

photo of Seasonal decorations on Fred the Tree keysweekly.com
Seasonal decorations on Fred the Tree.

photo of Holiday decorations at night Peter Busch
Holiday decorations at night.

In addition to Fred’s resilience and symbolic contribution to life on the Florida Keys, there are some potential engineering design lessons to be learned from Fred’s story. Highways and plants often are not a great mix. Highways are precisely engineered, but plants grow where they want to, like Fred. This can lead to landscaping that looks discordant rather than enhancing.

One example is when weeds pop up along expressway right-of-ways. A concrete Jersey barrier looks sleek on the highway’s opening day. But when stubborn weeds poke through, the separation starts to appear run-down.

photo of Weeds in highway separation barrier
Weeds in highway separation barrier.

An FHWA report, Roadside Use of Native Plants, provides guidance on working with native flora in roadway design. Overall, the approach is to design with native plants and expect them to grow where they can. Because they will.

Fred the Tree has been resilient, but he won’t be around forever. The life span of an Australian Pine is reportedly between 40 and 50 years. At some point, Fred will retire to the tree hereafter. But it appears that a sister, known as “Wilma the Tree,” has started to grow next to Fred (see Note 2 Below). Hopefully, Wilma will grow tall and strong and provide inspiration for residents and travelers in the Keys after Fred has departed.

Notes

Note 1

Here are some other acronyms that did not make it to the finals for tree naming (with help from ChatGPT):

Men’s names

JACK — Just Admire Coastal Keys

MIKE — Memories In Keys Environment

LUKE — Love Under Keys Expanse

DAVE — Driving Along Vast Expanse

SEAN — Scenic Enjoyment Along Narrows

PAUL — Peaceful Along Unique Landscape

ERIC — Enjoying Route In Coastlands

MARK — Marvel At Roadway Keys

TROY — Travel Route Of Yesteryear

NATE — Navigate And Take Everything-in

Women’s names

LILY — Love Island Life Year-round

ROSE — Relax On Scenic Expanse

ANNA — Appreciate Nature Near Atlantic

KATE — Keys Adventure To Enjoy

MAYA — Marvel At Your Atlantic

NINA — Nature In Narrow Atlantic

ELLA — Enjoy Life Along Atlantic

ZOE — Zen On Expanse

RUBY — Relax Under Blue Yonder

CLARA — Coastal Living Along Roadway Adventure

A few gender-neutral/playful options

CASEY – Coastal Adventure, Scenic Enjoyment Year-round

RILEY – Relaxation In Lower Expanse Year-round

SKY –Scenic Keys Year-round

OCEAN – Open Coastal Enjoyment Along Narrows

Note 2

Unlike Fred, Wilma the Tree does not yet have an official name. Wilma has also been referred to as “Randi the Tree” or “Fred Jr. the Tree.”

References

Fred the Tree

Accessed April 2026

Fred the Tree: The Florida Keys’ Celebri-Tree

Accessed April 2026

Road House: The True Story of Florida’s ‘Fred the Tree’ & Its Deeper Meaning for Dalton Explained,” by Lynne Sharpe

Accessed April 2026

Have You Met Fred the Tree? Introducing the Keys’ Quirkiest Resident

Accessed April 2026