Marathon Florida Keys Travel Guide

Marathon Florida

Welcome to Marathon, Florida, a tropical paradise in the heart of the Florida Keys, where the laid-back vibe of island life meets world-class fishing, diving, and natural beauty. Marathon is the Florida Keys’ sweet spot—less crowded than Key West, more action than the Upper Keys. Its waters teem with life, its history hums quietly, and its vibe stays authentically chill. Whether you’re diving a reef, fishing the Gulf, or sipping rum at sunset, Marathon feels like a tropical secret you’re in on. Plan your escape, this island’s calling!

Straddling the Overseas Highway (US-1) between Key Largo and Key West, Marathon is a cluster of islands stretching from mile markers 47 to 63, offering a perfect blend of relaxation and adventure. Whether you’re reeling in a marlin, swimming with dolphins, or savoring fresh seafood, Marathon delivers a quintessential Keys experience. In this travel guide, we’ll explore the top things to do, must-visit places, local cuisine, and essential tips for your Marathon vacation.

Marathon is located in the Middle Keys, about 110 miles southwest of Miami and 50 miles northeast of Key West. With a population of around 8,500, it spans several islands—most notably Vaca Key, Fat Deer Key, and Grassy Key—connected by bridges along US-1. Originally a fishing and railroad hub in the early 20th century, it’s now a haven for water lovers and nature enthusiasts, with a reputation as the “boating and family destination of the Keys.”

If you want to check out the keys stop in Marathon.  Yes it is a sports fishingmen's paradise with boats constantly leaving the marinas but they have many wonderful vacation rental accommodations with sites and sounds of the amazing wildlife, as well as, the surprisingly many restaurants Marathon has to offer.  Try experiencing ocean and seafood living in Marathon, whether Marathon is your getaway or you are just needing a place to stay along the way, Marathon is a great stop. Marathon is a 10-mile long vacation paradise comprised mainly of Vaca Key, Fat Deer Key, and the Grassy Key Islands. Each Key has it's own offering and makes for the most amazing place to see the the sun rise or set!

Marathon offers an assortment of water sports including sailing, fishing, wreck and reef diving, snorkeling, to go right in hand with beautiful sunny beaches, and amazing eco-attractions. You'll love the natural setting for fun that will keep everyone in the family happy and curious to learn more. There is nothing like wading through the shallow waters, live sea plants swaying, dozens of tiny fish leaping up, while water birds observe you from their perch along the edge. 

Marathon has two seasons; from May through October is considered hot and wet season, and then from November to April a warm and dry season. Either season is still a good time to visit the keys!

 

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Things to Do and See in Marathon, Florida Keys

Sombrero Beach

Why It’s Special: At 2000 Sombrero Beach Road (MM 50), Sombrero Beach is Marathon’s crown jewel, a free, public beach with powdery sand, swaying palms, and turquoise waters. Tucked off the Overseas Highway, it’s a local favorite that feels like a hidden paradise, offering swimming, picnicking, and a rare Keys beach vibe without the crowds.

From US-1, turn south at MM 50 onto Sombrero Beach Road—2 miles to the beach. Open sunrise to sunset, entry and parking (50+ spaces) are free. Facilities include restrooms, showers, picnic pavilions, and a playground. No lifeguards, but waters are calm—best for families. Arrive early in peak season (winter) for a spot.

Swimming: Wade into shallow, warm waters perfect for kids or a lazy float. Depths stay under 5 feet near shore; no strong currents. Hunt for shells, coquinas, conchs, and sea glass wash up, especially after storms. Low tide reveals tide pools with tiny crabs. Eight shaded pavilions (first-come, first-served) with grills so bring burgers or fish. Sandy tables dot the shore too.

Rent Kayaks from Wheels-2-Go to paddle Boot Key Harbor’s mangroves and spot herons and fish. Launch from the beach’s east end. Lay out on soft sand, bring a towel or rent chairs. Sunset here rivals Key West’ they are both golden and serene.

Hit it midweek or early (before 10 a.m.) weekends fill fast. Summer’s quiet but hot—bring shade (no rentals onsite). Wear water shoes; shells can prick. Sunscreen’s a must—palms offer little cover. Pack a cooler, there are no concessions, but a Publix is 5 minutes away on US-1. Alcohol’s allowed but no glass. Watch for nesting turtles (May-October) and marked areas are off-limits.

Sombrero Beach is Marathon’s tropical heart is unspoiled, free, and easygoing. It’s where you’ll feel the Keys’ laid-back soul under your toes!

 

Dolphin Research Center

Why It’s Special: Located at 58901 Overseas Highway (MM 59) on Grassy Key, this nonprofit marine mammal facility is a Marathon highlight. Home to a pod of rescued and born-in-captivity dolphins, it blends education, conservation, and interaction—think swimming with dolphins or watching them paint. It’s a bucket-list stop for animal lovers and families.

Getting There and Basics: On US-1 northbound at MM 59, it’s a 10-minute drive from central Marathon. Open 9 a.m.-4:30 p.m. daily, general admission is free under 4. Interactive programs (like swims) book online weeks ahead. Free parking; plan 2-4 hours.

Watch daily shows (included with admission)—dolphins flip, splash, or “paint” canvases. Feeding sessions let you toss fish. “Dolphin Dip” offers dorsal fin rides; “Meet the Dolphin” includes a swim and handshake—ages 5+ only, with adult supervision. Free talks (every 30 minutes) cover dolphin behavior and rescue stories—meet stars like Santini, a 40-year resident. Touch tanks have starfish and urchins. Kids cool off in a dolphin-themed splash zone—free with entry, bring towels. Snag dolphin tees or plushies proceeds fund conservation.

Book swims early for the Dolphin Research Center, slots sell out months ahead in winter. Arrive by 9 a.m. for general admission to beat crowds. Wear swimsuits under clothes for programs; lockers and showers are available. No outside food—snacks sold onsite. Bring a camera—dolphin antics are photo gold. Quiet voices keep them calm. Pair it with a Grassy Key drive which is a quaint and scenic area, just north.

The Dolphin Research Center is pure Keys magic, heartwarming, interactive, and a chance to connect with these playful creatures up close!

 

Old Seven Mile Bridge to Pigeon Key

Why It’s Special: Stretching from MM 47 in Marathon to Pigeon Key, this 2.2-mile segment of the 1912 Overseas Railroad is a historic marvel turned pedestrian path. Closed to cars since 1982, it’s now a scenic walkway/bikeway linking Marathon to a tiny island with a preserved railroad village. It’s a blend of engineering history and Keys beauty.

Park at MM 47 (westbound side of US-1)—free lot with 20+ spaces near Knight’s Key. Open 24/7, no entry fee, though Pigeon Key tours are available for a fee. (includes ferry). Access is via a gated ramp which is open sunrise to sunset. Allow 1-3 hours, depending on Pigeon Key plans.

Stroll or pedal the 2.2-mile bridge—flat, paved, and wide. Views span the Atlantic and Gulf for spotting of rays or tarpon below. Rent bikes from Wheels-2-Go.

Take the ferry (10-minute ride, 9 a.m.-2 p.m.) or walk the full bridge to this 5-acre island, Pigeon Key. Tour the 1912 worker village, eight buildings, including a museum with railroad relics.

Cast your pole from the bridge for snapper and grunts bite near pilings. No license needed for saltwater from shore. Capture the bridge’s weathered steel against turquoise seas where the sunrise or sunset glows golden. Look for ospreys, pelicans, or manatees if you have binoculars they do enhance the experience.

Go early to avoid the heat and crowds peak midday. Summer’s steamy; winter’s breezy and best. Wear hats and sunscreen, there is no shade on the bridge. Bring water; no facilities until Pigeon Key. Check pigeonkey.net for ferry times—weekends can skip runs. Walking takes 45 minutes each way—bike’s faster. Stop at the Marathon end for a post-trek beer at Overseas Pub (MM 47.5).

The Old Seven Mile Bridge is Marathon’s historic spine, it is a quiet, stunning trek where the Keys’ past meets its endless horizon.

 

Crane Point Museum and Nature Center

Crane Point Museum & Nature Center (5550 Overseas Highway) spans 63 acres with trails through hardwood hammocks, a bird rescue center, and a historic 1900s home. There is a short 9 minute film in the Orientation Hall to get an overview of Crane Point’s features of  what to discover and where to walk along the many natural trails through the center. They also offer guided tours of the property on golf carts!

Water Adventures

Marathon’s nickname, “Heart of the Keys,” reflects its prime aquatic offerings. Sombrero Beach, a free public beach on Vaca Key, boasts soft sand, calm waters, and picnic pavilions that are perfect for swimming or kayaking. Rent kayaks from Wheels-2-Go to paddle nearby mangroves.

Marathon claims the title “Sportfishing Capital of the World.” Charter a boat with Sea Dog Charters half/full day) to target tarpon, mahi-mahi, or sailfish in the Gulf or Atlantic. For a casual cast, try the Old Seven Mile Bridge for free to fish, just bring your gear.

Diving and snorkeling thrive at Sombrero Reef, a living coral reef 4 miles offshore. Book a trip with
Tilden’s Scuba Center, gear included) to explore its vibrant corals and fish such as parrotfish, angelfish, and barracuda galore. Boat access only; visibility peaks in spring.

Curry Hammock State Park

Curry Hammock State Park (MM 56.2) offers kayaking through mangroves, biking on trails, and a quiet beach. Spot sea turtles, manatees, and wading birds; sunrise here is magical.

Family Fun

Kids adore Turtle Hospital (2396 Overseas Highway,), where you can tour rehab facilities and feed rescued sea turtles. Coco Plum Beach, quieter than Sombrero, has shallow waters and tide pools for little explorers. The Marathon Community Park (MM 49) offers free playgrounds, skate ramps, and sports fields.

Boating rents from Captain Pip’s  to cruise the Keys’ backcountry or sandbars. Paddleboarding and jet skiing  from Keys Kayak add thrills. Golfers enjoy the 9-hole Sombrero Country Club, a par-3 course with ocean breezes.

For a sunset sail, book with Fury Water Adventure, cocktails and dolphin sightings included. Cyclists love the Florida Keys Overseas Heritage Trail, a paved path paralleling US-1 through Marathon—free and scenic.

Day Trips

Day trips include Key West (1 hour southwest) for Duval Street and Hemingway, or Islamorada (45 minutes northeast) for more fishing and art.

Cuisine

Marathon’s food scene is all about fresh seafood, Keys classics, and tropical flair. Here’s what to taste:

Must-Try Dishes

Conch Fritters: Crispy, spiced balls of conch meat with dipping sauce—a Keys staple.
Stone Crab Claws: Harvested October-May, served chilled with mustard sauce—sweet and succulent.
Key Lime Pie: Tangy, creamy, and iconic, Marathon’s versions rival Key West’s.

Top Restaurants

Keys Fisheries (3502 Gulfview Avenue): Dockside seafood—stone crab and lobster rolls. Order at the counter, eat with bay views.
Lazy Days Restaurant (79867 Overseas Highway): Oceanfront with hook-and-cook options—bring your catch .
Castaway Waterfront Restaurant (1406 Oceanview Avenue): Dive-bar vibes with sushi and peel-and-eat shrimp.
Island Fish Co. (12648 Overseas Highway): Tiki-hut spot for mahi tacos and rum runners .
Burdines Waterfront (1200 Oceanview Avenue): Casual burgers and fries with killer fries .
Sweet Savannah’s (8919 Overseas Highway): Key lime pie and ice cream is a local gem.

Seafood dominates this area with conch, lobster, and fish caught daily. Cuban influences add mojo pork and black beans, while tropical fruits like mango and coconut spice up desserts and drinks. Pair meals with a Keys Disease cocktail (rum, pineapple, coconut) or local brews from Florida Keys Brewing Co. in Islamorada.

Climate and Accessibility

The climate is tropical, with hot, humid summers (June-September, highs in the 90s°F) and warm, dry winters (December-March, 70s-80s°F). Summer brings afternoon rains and hurricane risks (June-November), while winter is peak season with ideal weather and higher rates. Spring (April-May) and fall (October-November) offer warm days, fewer crowds, and calm seas, perfect for outdoor fun.

Marathon is accessible via the Florida Keys Marathon International Airport (MTH), a small airstrip for private flights and charters, or a 2-hour drive from Miami International Airport (MIA) along the scenic Overseas Highway. Key West International Airport (EYW), 50 miles southwest, is another option. A car is key for exploring—US-1 links everything, but bikes and golf carts work for short hops around town. Parking is ample and mostly free.

Map of Marathon in the Florida Keys

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