What Mile Marker Is Duck Key in the Florida Keys?

If you’ve been driving the Overseas Highway and wondering what mile marker Duck Key is at, here’s your answer: Duck Key sits at Mile Marker 61, on the ocean side of US Highway 1 in the Middle Florida Keys.

That puts it right in the heart of the Keys — about 61 miles from the northern end of the Overseas Highway, roughly halfway between Key Largo and Key West. It’s close enough to Marathon to pop over for supplies or a meal, and just an hour’s drive from Key West when you want a day trip. In other words, it’s a pretty great spot to land.

Where Exactly Is Duck Key at MM 61?

Duck Key is tucked just off the Overseas Highway between Conch Key and Grassy Key. You’ll cross over the island’s canals via a series of small, arched bridges that give the place a distinctly Caribbean feel. 

Marathon is about 9 miles to the southwest, and Islamorada is roughly 22 miles to the northeast. To see other mile markers and destinations nearby, see a list of mile markers.

The island sits on the ocean (Atlantic) side of US 1, which means you’ve got some beautiful views of the Florida Straits. It’s a small community — fewer than 800 residents — but it punches well above its weight when it comes to things to do and places to stay.

Map of Duck Key in the Florida Keys find What Mile Marker Is Duck Key in the Florida Keys
Duck Key is in a prime position on the map of the Florida Keys.

A Little History Behind Duck Key

Duck Key has a surprisingly interesting backstory. The island was a salt manufacturing operation back in the 1820s and 1830s.

Salt was a big deal back then — it was essential for preserving food before refrigeration existed. Old records from 1828 describe the island as “low, rocky, and covered with mangroves” with saltworks that were eventually moved to Key West.

Things got harder after the catastrophic Labor Day Hurricane of 1935, which basically wiped out the island and left it uninhabited. Duck Key sat empty until 1953, when a causeway was finally built connecting it to the Overseas Highway. That’s when things started to turn around.

And there’s even a bit of pirate lore thrown in. Stories of treasure have circulated for years, likely fueled by the many shipwrecks in the Middle Keys.

One notable wreck nearby is the Sueco de Arizon, part of the doomed Spanish fleet of 1733. Divers have reportedly recovered coins from the wreck in just eight feet of water, which has kept the treasure talk alive ever since.

Hawks Cay Resort: The Heart of Duck Key

Hawks Cay Resort on Duck Key
Hawks Cay Resort is a big part of Duck Key.

If Duck Key is on your radar, there’s a good chance Hawks Cay Resort is why. This upscale, Caribbean-inspired resort is the main attraction on the island, and honestly, it’s hard to argue with that.

The property offers hotel rooms as well as private villas with water views, making it a solid pick for everyone from couples to large families.

The resort sits right on the water with five pools, a full-service marina, a spa, and six dining options on property. The standout for food is Angler and Ale, a casual waterfront spot with fresh seafood and a great cocktail list. Word is the ahi nachos are worth ordering.

One heads-up: Duck Key is a bit removed from everyday conveniences. The nearest convenience store is about 15 minutes away, so the on-site marketplace at Hawks Cay — which has a Starbucks, a pizzeria, and basic supplies — is genuinely useful.

Things To Do at Duck Key (MM 61)

Small island, big activity list. Here’s what you can get into at and around Mile Marker 61:

World-Class Fishing

The Middle Keys are consistently rated among the best fishing destinations in the world. Right from Hawks Cay Marina you can book charters targeting everything from bonefish and permit on the flats to mahi-mahi, grouper, tarpon, and swordfish offshore. If you’re into light tackle flats fishing, the shallow waters around Duck Key are ideal for permit and bonefish. If you want to go offshore, the options are just as strong.

Snorkeling and Scuba Diving

The coral reefs around Duck Key are some of the most beautiful in the Keys. The nearby Coffins Patch Sanctuary Preservation Area is a top spot for snorkelers and divers, with vibrant coral formations, tropical fish, sea turtles, and the occasional nurse shark. Guided dive charters operate daily from Hawks Cay Marina for small groups, and equipment rentals are available on site.

Dolphin Connection at Hawks Cay

One of the most popular experiences on the island is the Dolphin Connection program at Hawks Cay. Visitors can get in the water and interact with dolphins in a supervised, natural setting. It’s a big hit with families, and the photographers they have on hand mean you don’t have to worry about capturing the moment yourself.

Kayaking and Paddleboarding Through the Mangroves

The calm, shallow waters around Duck Key are perfect for kayaking and paddleboarding. Paddling through the mangrove channels is a peaceful way to see the local ecosystem up close — manatees, seabirds, and all kinds of fish hang out in these areas. Gear rentals are available through Sole Watersports at Hawks Cay.

Sunset Cruises

Sunset cruises depart right from the Hawks Cay Marina. The view of the Florida Keys sky at golden hour from the water is something else. Many cruises include drinks and light food, making it a perfect low-key way to wrap up a day on the island.

aerial view of Duck Key and Hawks Cay Resort
The island of Duck Key with the huge footprint of Hawks Cay.

Great Day Trips From Mile Marker 61

Duck Key’s central location makes it one of the best base camps in the Keys. Here’s what’s within easy reach:

  • Marathon (9 miles south): Visit the Turtle Hospital, grab lunch at Keys Fisheries, or spend a morning at Sombrero Beach. Easy half-day.
  • Islamorada (22 miles north): Known as the Sportfishing Capital of the World. Great for fishing, dining, and gallery browsing.
  • Long Key State Park: Just a short drive north. Beautiful undeveloped park with kayaking, hiking trails, and birdwatching.
  • Key West (about 1 hour south): A full day’s worth of sightseeing, bar hopping on Duval Street, Mallory Square sunsets, and the Southernmost Point. Easy to do as a day trip from Duck Key.
  • Curry Hammock State Park: Close by and great for families, with swimming, kayaking, and nature trails.

Best Time To Visit Duck Key

November through April is the sweet spot for visiting the Florida Keys in general, and Duck Key is no exception.

The dry season brings lower humidity, cooler temps, and less chance of tropical weather. That said, mid-August through mid-October can also offer postcard-perfect weather — just keep an eye on the tropics if you’re visiting during that window.

How To Get To Duck Key (Mile Marker 61)

The only road in and out is the Overseas Highway (US 1). Duck Key is about 1 hour and 20 minutes from Key West International Airport and about 2 hours from Miami International Airport. You can also fly into Marathon Airport, which is only about 9 miles from the island, making it a very short hop.

Once you’re on the island, most residents and visitors get around by golf cart or boat. The island is small enough that you really don’t need a car for everyday activity once you’ve arrived.

FAQs About Duck Key, Florida

What mile marker is Duck Key in the Florida Keys?

Duck Key is at Mile Marker 61 on the Overseas Highway (US 1), on the ocean side of the road in the Middle Florida Keys.

Is Duck Key worth visiting?

Absolutely. It’s a quieter, more upscale alternative to the busier Keys destinations. If you want great fishing, snorkeling, dolphin encounters, and waterfront dining without the crowds of Key West, Duck Key is a fantastic choice.

Does Duck Key have a beach?

Duck Key doesn’t have a traditional sandy beach like you’d find on the Gulf Coast. However, Hawks Cay Resort has pools and a lagoon area with a very tropical feel, and there are several great beaches within a short drive, including Sombrero Beach in Marathon.

What is Hawks Cay Resort at Duck Key?

Hawks Cay is the main resort on Duck Key at MM 61. It offers hotel rooms and Caribbean-style villas, five pools, a full marina, multiple restaurants, a dolphin experience, water sports, and fishing charters. It’s the anchor of Duck Key tourism.

How far is Duck Key from Key West?

Duck Key at MM 61 is about 61 miles from Key West, which translates to roughly a 1-hour drive down the Overseas Highway. It makes for an easy and very enjoyable day trip.

How far is Duck Key from Key Largo?

Key Largo starts around Mile Marker 106, so Duck Key at MM 61 is about 45 miles to the south — roughly a 45-minute to 1-hour drive depending on traffic.

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larry edger _ author About the Author: I’m Larry Edger, a Florida resident who’s spent decades exploring the state—beaches, islands, springs, small towns, and road trips. I publish practical Florida travel guides with real-world planning tips and seasonal updates. Read more about Florida Travel Blog →

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