The Florida Keys offer a variety of cultural and historical things to do, as well as access to a wide array of nature and nature-related activities. It was Earnest Hemmingway that helped make the keys trendy, for those in the know.
However, when vacationers come to the Florida Keys to vacation, it is most certainly the weather, beaches, and crystal clear water that attracts them. And Marathon Florida has the #1 ranked beach in the Florida Keys: Sombrero Beach (more details below).
But before you pack your towel expecting endless stretches of soft white sand like Miami or Daytona, it’s important to know: the Keys are a unique landscape. Rather than miles of wide, sandy beaches, you’ll find a string of coral rock islands, dotted with cozy coves, natural beaches, and plenty of opportunities to get in the water. The true beauty of a Keys beach day is often about what’s in the water—vibrant coral reefs, gentle sandbars, and turquoise shallows perfect for swimming, snorkeling, or just floating your cares away.
There are several beaches here, including Calusa, Loggerhead, and Sandspur. They offer white sands, as opposed to many beaches in the Keys that have pebble beaches.
It’s worth noting that the beaches in this area are a bit different from the long, wide stretches of powdery sand you might find in places like Miami or Daytona. The Florida Keys are made up of coral rock islands, so truly expansive sandy shores are rare. Instead, you’ll find smaller pockets of sand—like those at Calusa, Loggerhead, and Sandspur—set against sparkling waters and surrounded by vibrant coral reefs. While you may not get endless miles of beach, you will discover tranquil spots ideal for swimming, snorkeling, and soaking up the sun in a setting that feels uniquely Keys.
What Sets the Florida Keys Apart?
The Keys aren’t known for sprawling beaches like other parts of Florida—they’re about getting in the water. If your idea of paradise is lounging on endless white sand, you may want to look elsewhere. But if you’re seeking adventure, Marathon is the perfect match. Here you’ll find:
Snorkeling with tropical fish at places like Sombrero Reef
Boating out to secluded sandbars hidden among turquoise waters
Kayaking through winding mangrove tunnels
Eco-adventures that immerse you in some of Florida’s most unique marine environments
What to Expect from Florida Keys Beaches
Now, it’s important to reset your expectations if you’re dreaming of classic stretches of powdery sand like you’d find in Miami Beach or Daytona. The Florida Keys are a world apart—literally and figuratively. Formed atop ancient coral reefs, these islands offer a unique shoreline experience. Instead of endless expanses of sandy beach, you’ll discover cozy inlets, gentle sandbars, and calm turquoise waters perfect for swimming, snorkeling, or paddling.
That’s not to say there aren’t any sandy spots! You’ll find several wonderful beaches scattered throughout the Keys, but generally, they tend to be on the more petite side and often feature a mix of sand and coral. The real stars of the show here aren’t the beaches themselves, but the crystal-clear waters, vibrant marine life, and hobby-friendly access to activities—think snorkeling above coral reefs, kayaking through mangroves, and lounging in tranquil coves.
So, while you might not be building mile-long sandcastles, you’ll have plenty of opportunities to bask in the sun and enjoy one-of-a-kind coastal adventures. For those who truly crave that wide, sweeping lounge-on-the-beach experience, parts of mainland Florida are a better bet. But if you’re open to a different kind of paradise, the Keys more than deliver.
Making the Most of Your Beach Day in Marathon
To truly soak up the Marathon beach experience, timing is everything—plan to arrive early to claim your favorite shady spot under a palm. A small entrance fee may apply at some parks, but the pristine natural scenery is well worth the price of admission.
Keep in mind, not every beach is a swimmer’s paradise. Some are better suited for leisurely strolls, sunrise photos, or simply unwinding to the sound of gentle surf. If you’re seeking adventure beyond sunbathing, consider booking a local sandbar excursion: several outfits depart right from Marathon, offering a sunny escape for a few hours where you can splash, snorkel, and spot wildlife offshore.
Best Beaches Marathon Florida
Sombrero Beach – Marathon Key – Rated #1 in the keys by some
Its popularity stems, in part, from all the amenities you can find there. This includes:
BBQ stations
The pier,
Public showers
A bicycle path
Wheelchair accessibility
Outdoor picnic area (overlooking the ocean and set among lush coconut palm trees)
Bahia Honda State Park Beach – Big Pine Key
Some say best in the whole of the USA There are several beaches here, including Calusa, Loggerhead, and Sandspur. They offer white sands, as opposed to many beaches in the Keys that have pebble beaches.
Things to do: The park allows overnight camping, has a boat ramp, fishing, canoeing & kayaking, bike paths, and more.
Beyond the basics, you’ll find a surprising variety of activities and natural beauty here. While the Florida Keys aren’t known for long, wide sandy beaches, this park features one of the few natural sandy stretches in the area—ideal for relaxing, wading, or simply soaking up the sun. Calm, clear waters make it perfect for swimming or snorkeling right off the shore, and you’ll often spot tropical fish flitting among the rocks.
If you’re up for adventure, rent a kayak or paddleboard to explore the mangroves and flats nearby. The park’s amenities include restrooms, picnic tables, volleyball courts, and even a playground for the kids. Birdwatchers and nature lovers will appreciate the tranquil walking trails and minimal crowds, especially during low tide when more of the beach is revealed.
Whether you’re casting a line, paddling out at sunrise, or gathering for a sunset picnic, this spot offers a little something for everyone—making it a favorite for both locals and visitors looking to experience the Keys’ natural side.
$8.00* per vehicle. Limit 2-8 people per vehicle.
Hours: park 8 AM – Sunset; The concession Building is open 8:00 a.m. to 5:00 p.m.
Coco Plum Beach — A natural beach on the Atlantic
Can You Swim at Coco Plum Beach?
While the tranquil stretch of Coco Plum Beach invites a relaxing morning stroll or a peaceful place to watch the sunset, it’s not the top pick for swimming enthusiasts. The shoreline often has seagrass washed up, which makes wading or swimming less appealing than at other local beaches. That said, if you’re after a quiet escape, coastal scenery, or just want to snap a few beautiful photos without the crowds, Coco Plum is a lovely spot to kick off your sandals and take it all in.
There is a natural beach area with an adjacent wetland area. It is also a turtle-nesting beach also. Restroom facilities and a covered pavilion are available.
Hours: 7:30 a.m. until dusk
Directions: Turn south on Coco Plum Drive and the beach entrance is 1.4 miles on the right-hand side of the road.
