The Florida Keys offer a variety of cultural and historical activities, as well as access to a wide array of nature and nature-related activities. It was Ernest Hemingway who 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 attract them. Marathon, Florida, has the #1-ranked beach in the Florida Keys: Sombrero Beach (see details below). There are many reasons why Marathon, FL, is the Ultimate Family Vacation destination, not the least of which are the magnificent sunsets. Explore our Travel Guide and the best time to visit the Florida Keys.
But before you pack your towel expecting endless stretches of soft white sand like Miami or Daytona, it’s essential 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.
The beaches in this area are a bit different from the long, vast 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 Keys-like setting.
Why You’ll Love a Beach Day in Marathon
What makes a Marathon beach day unforgettable isn’t just the scenery—it’s the sheer variety of ways to enjoy the shoreline. Whether you’re stretching out in a hammock under a palm, sinking into a shaded lounger, or launching a kayak right from the shore, this is a place to relax and explore at your own pace. Many beaches offer amenities like picnic areas, gentle entry points for paddleboards, and family-friendly spaces to unwind. And if you’re feeling adventurous, sandbar trips are a local favorite—set sail with a local outfitter and spend an afternoon basking on a sun-drenched sandbar surrounded by nothing but turquoise water.
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
Rather than a classic “lay-on-the-sand” beach vacation, the Florida Keys invite you to embrace a water-centric experience. Whether you’re paddling a kayak through shaded mangroves, spotting sea turtles and rays while snorkeling, or anchoring your boat on a quiet sandbar for an impromptu picnic, the Keys offer a whole new way to enjoy the shoreline. If you crave tranquil coves, endless opportunities to get wet, and a sense of discovery around every bend, you’ll find your kind of beach day right here.
What Makes Marathon’s Beaches Special?
Instead of traditional, wide sandy beaches, Marathon is dotted with cozy lounging areas and direct ocean access points perfect for both relaxation and adventure. Imagine unwinding in a hammock under swaying palms, or setting out with a paddleboard or kayak right from shore to explore the calm, shallow waters. Many resorts and public areas offer shaded loungers and sandy spots designed for taking in the view (and the breeze), even if the sand doesn’t stretch on for miles.
Pro Tip: For a truly memorable day, book a sandbar excursion. Several local operators offer boat trips departing straight from Marathon, whisking you out to sun-drenched sandbars where you can swim, picnic, or just soak up the Keys sunshine in total tranquility.
Whether you want to relax in a hammock, paddle through the flats, or embark on an eco-friendly adventure, Marathon’s beaches and waterfronts deliver a little something for every kind of explorer.
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 that not every beach is a swimmer’s paradise. Some are better suited for 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.
Tips for Planning Your Perfect Keys Beach Day
- Pack for flexibility: Bring a snorkel, water shoes, and a sun hat—most beaches offer both sandy stretches and rocky, coral-rich shallows.
- Snack Like a Pro: Hungry kids become cranky beach-goers fast. Stock up on portable snacks—think granola bars, fruit pouches, and trail mix—to keep everyone fueled between meals.
- Build in Downtime: Plan your days with pockets of rest. An hour of shade and quiet with a beach read or a nap can be the difference between sweet family memories and a full-on meltdown.
- Prepare for the Sun: The tropical sun is no joke. Pack plenty of high-SPF sunscreen, long-sleeve rash guards, wide-brimmed hats, and sunglasses for everyone. A small pop-up shade tent works wonders for mid-day breaks, especially with younger kids.
- Arrive early: The best spots (especially shaded pavilions or picnic tables) fill up quickly, particularly on weekends or holidays.
- Check for amenities: Some beaches provide restrooms, showers, playgrounds, and BBQ grills, while others are more rustic.
- Respect nature: Many beaches are nesting sites for turtles or home to unique birdlife. Please observe posted signs and keep a respectful distance from wildlife.
- Explore beyond the sand: The Keys are all about connecting with the water, so don’t hesitate to rent a kayak, join a snorkeling tour, or simply wade out to explore the shallows.
- Keep Activities Handy: Whether you’re waiting out a rain shower or chilling by the water, simple activities (think coloring books or cards) can buy you priceless moments of peace.
- Set Expectations: Let kids know what the day holds—and involve them in planning. Whether they’re choosing which cove to explore or which treat to try, a little say goes a long way in keeping spirits high.
With a bit of forethought and a dash of flexibility, traveling with kids in the Florida Keys becomes less about the challenges and more about shared adventures—all while making memories that last long after the sand has been shaken from your shoes. Whether you want to unwind on a quiet beach or launch into an aquatic adventure, Marathon’s shores make it easy to do both—often in the same day.
Why Families Love the Florida Keys
Whether you’re traveling with kids, teens, or just the young-at-heart, the Florida Keys are packed with experiences that make for unforgettable family memories. Beyond the beaches, families find adventure in:
- Visiting the Turtle Hospital in Marathon for up-close encounters with rescued sea turtles and a fun, educational tour.
- Explore the Dolphin Research Center, where you can watch dolphins at play and even participate in interactive programs.
- Strolling the old Seven Mile Bridge (recently restored), perfect for a scenic family bike ride or sunset walk.
- Discover hands-on marine life at the Florida Keys Aquarium Encounters, where touch tanks and snorkeling lagoons delight all ages.
- Kayaking through mangrove tunnels, spotting manatees and vibrant fish just below the surface.
- Joining a family-friendly snorkeling tour to Sombrero Reef, one of North America’s largest coral reefs.
From learning about shipwrecks at the local museums to searching for iguanas along nature trails, there’s no shortage of ways to spark curiosity and adventure for every generation.
Best Beaches Marathon, Florida
What is the best beach in Marathon for families? Sombrero Beach is widely considered the best family beach in the Florida Keys. It offers shallow water for swimming, a large playground, shady pavilions, and full restroom facilities, making it easy to spend the entire day with kids.
Located right in Marathon, Sombrero Beach is a local favorite and doesn’t require the long trek all the way to Key West—perfect for families looking to maximize their beach time without spending hours in the car. Parents can relax under the palm trees while kids burn off energy at the playground or splash safely in the gentle surf. The beach’s picnic areas and restrooms mean you don’t have to pack up and leave just for a snack or bathroom break, making it a true set-it-and-forget-it destination for a stress-free family outing.
Whether you want to build sandcastles, enjoy a seaside picnic, or just soak up the sun, Sombrero Beach checks all the boxes for an easy, kid-friendly day on the sand.
Sombrero Beach – Marathon Key – Rated #1 in the Keys.
Its popularity stems in part from 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)
Sombrero Beach is also a favorite for families and active travelers. With its gentle surf, shaded playground, and volleyball courts, it’s easy to spend a full day here. The beach is dog-friendly (leashed), so your pup is welcome to join the fun. Early risers can catch stunning sunrises, while evening visitors are treated to pastel sunsets over the Atlantic.
Bahia Honda State Park Beach – Big Pine Key
Bahia Honda State Park
Some say the best in the whole of the USA
While not in Marathon, we included it because it is nearby (only 15 minutes away) and many consider it the best – anywhere! There are several beaches inside Bahia Honda National Park, including Calusa, Loggerhead, and Sandspur. They offer white sands, as opposed to many beaches in the Keys that have pebble beaches.
Why It’s Worth the Trip:
- Incredible snorkeling right off the shore, with calm, clear waters perfect for spotting tropical fish flitting among the rocks
- Iconic views of the old Bahia Honda Rail Bridge—don’t forget your camera for those postcard-worthy shots
- Kayak and paddleboard rentals are available, making it easy to explore the mangroves and shallow flats nearby
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.
Insider Tip: Bahia Honda is about 30 minutes from Marathon, making it an easy day trip and a must for anyone seeking unspoiled natural beauty. There’s an entrance fee, but it’s worth every penny for the views, amenities, and sheer serenity you’ll find along these sands.
Coco Plum Beach — A natural beach on the Atlantic
Can you swim at Coco Beach, Marathon?
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 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.
What Makes Coco Plum Beach Unique?
- This is a natural beach with a distinctly laid-back, local vibe—minimal crowds, lots of space, and a peaceful atmosphere.
- It’s a favorite spot for kayaking and paddleboarding, especially during calm mornings.
- Dog owners, rejoice: Coco Plum is dog-friendly, so your four-legged friend is welcome to tag along on your adventure.
- The beach is best visited at low tide, when more sand is exposed, and there’s extra room to explore.
A Few Things to Know:
There is a natural beach with an adjacent wetland. It is also a turtle-nesting beach, so you might spot protected areas during nesting season. Restroom facilities and a covered pavilion are available for a little extra comfort while you’re there.
Quick Tip: Coco Plum isn’t ideal for swimming due to the seagrass, but it’s perfect for a peaceful walk or a sunset moment with your camera in hand.
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.
Need a Place to Stay?
After a day of exploring Marathon’s unique beaches, there’s nothing better than kicking back in your own retreat. View our collection of vacation rental homes with a private pool, access to a private beach, and a deep-water dock—complete with 30/50 AMP power and freshwater cleaning—so you can make the most of your Florida Keys escape.
Frequently Asked Questions
1. What is the best beach in Marathon for families? Sombrero Beach is widely considered the best family beach in the Florida Keys. It offers shallow water for swimming, a large playground, shady pavilions, and full restroom facilities, making it easy to spend the entire day with kids.
2. Which beaches in Marathon are dog-friendly? Coco Plum Beach is the top choice for dog owners. It is a natural, laid-back beach where leashed dogs are welcome to enjoy the shoreline with their owners.
3. Is there a fee to visit beaches in Marathon, FL? Sombrero Beach and Coco Plum Beach are open to the public and offer free parking. However, Bahia Honda State Park (located just 15 minutes south) requires an $8.00-per-vehicle entrance fee.
4. When is the best time to visit the beaches in Marathon? To beat the crowds and secure a shady spot, aim to arrive before 10:00 AM. For the best water clarity at Sombrero Beach, visiting during high tide is recommended. Regarding the season, discover more about the best time to visit.
5. Best Things to Do in Islamorada with Kids. Islamorada is a treasure trove of family-friendly activities that make exploring the Keys with little ones a breeze. Here’s a quick look at top picks to keep kids of all ages entertained:
- Feed the Tarpon at Robbie’s Marina
A classic family stop—grab a bucket of fish and watch gigantic tarpon leap out of the water for their snack. Bonus: plenty of pelicans on patrol for dropped treats. - Explore the Theater of the Sea
Kids love watching dolphins and sea lions perform, plus there are opportunities to meet sea turtles and learn about marine conservation. - Hang Out at Founders Park
This local favorite features a sandy beach, swimming area, playground, walking trails, and even an Olympic-sized pool if you need a freshwater fix. - Try Kayaking or Paddleboarding
Several outfitters along the Overseas Highway offer rentals and guided tours through crystal-clear waters, perfect for spotting fish and maybe even a manatee. - Take a Glass-Bottom Boat Tour
For families with little swimmers (or skeptics about snorkeling), glass-bottom boat rides reveal sparkling coral reefs and colorful sea life without ever getting wet. - Visit the History of Diving Museum
Interactive exhibits and quirky artifacts introduce kids to the world beneath the waves—a fun spot to duck out of the midday sun.
With so many hands-on adventures and natural wonders, Islamorada will have your family plotting a return trip before you’ve even packed up the sunscreen.
