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Overview
Key Largo is the largest island in the Florida Keys archipelago and sits roughly 60 miles south of Miami via the Overseas Highway (US-1). It is widely regarded as the gateway to the Keys, and its primary draw is the sea: the island sits adjacent to John Pennekamp Coral Reef State Park, the first undersea park in the United States and home to one of the most accessible sections of the Florida Reef Tract.
Despite its fame as a diving and snorkeling destination, Key Largo also appeals to kayakers, paddleboarders, sport fishers, and anyone simply looking for a quieter, more relaxed alternative to Miami or the busier stretch of the Keys near Key West. The town itself is largely a single commercial strip along US-1, so visitors spend most of their time on or in the water rather than exploring an urban environment.
The island's character is decidedly casual — flip-flops and board shorts are the everyday uniform, waterfront tiki bars do brisk business, and the pace of life slows noticeably once you cross Card Sound Road or the 18-mile stretch of the Overseas Highway that connects the mainland.
Before You Go
Visas and Entry
Key Largo is a domestic US destination. International travelers should verify entry requirements through the official US Customs and Border Protection website and consult TravelerPulse's Visas section for general guidance — do not rely solely on this guide for immigration rules.
When to Go
The dry season (roughly mid-November through April) brings lower humidity, fewer mosquitoes, and calmer water visibility — ideal for diving and snorkeling. Summer months are hot and humid, with increased afternoon thunderstorm activity and the possibility of tropical storms or hurricanes (the Atlantic hurricane season runs June 1 through November 30). Prices and crowds tend to peak around US federal holidays and spring break in March.
What to Pack
- Reef-safe sunscreen (Florida law encourages use of mineral-based sunscreens to protect coral)
- Rash guard or UV-protective shirt for extended time on the water
- Light, moisture-wicking clothing year-round; a light layer for cooler winter evenings
- Motion-sickness medication if you are prone to seasickness on dive or snorkel boats
- Insect repellent, particularly in summer months
Health Notes
No vaccinations are required for domestic US travel. Jellyfish, sea urchins, and fire coral are present in the reef environment — heed guides' safety briefings. The nearest hospital with full emergency services is in Homestead or Miami; verify the location of the nearest urgent care facility upon arrival.
Getting There
By Air
Key Largo does not have a commercial airport. The most practical gateway is Miami International Airport (MIA), located approximately 60–65 miles north. Fort Lauderdale-Hollywood International Airport (FLL) is a workable alternative, adding roughly 20–30 minutes of drive time. From either airport, rental cars are the standard option for reaching Key Largo.
By Road
US Highway 1, known as the Overseas Highway, is the sole highway connecting the Florida Keys to the mainland. From Miami, take Florida's Turnpike south to its terminus, then follow US-1 south across the Card Sound Bridge or the more scenic 18-mile stretch through Florida City. Key Largo begins at approximately Mile Marker 106. Traffic can be significant on Friday afternoons and Sunday evenings, particularly during peak season — plan accordingly.
Shuttles and Shared Rides
Some private shuttle services operate between Miami International Airport and the Keys. Verify current operators and schedules locally or through your accommodation, as services change. Rideshare availability diminishes significantly once you enter the Keys.
Getting Around
A rental car is effectively essential for getting around Key Largo. The island stretches roughly 30 miles along US-1, and attractions, marinas, restaurants, and lodging are spread along this corridor referenced by Mile Markers (MM). Most visitor activity clusters between approximately MM 90 and MM 106.
Bicycling is possible but requires caution — US-1 has significant traffic and limited dedicated cycling infrastructure in places. Some resort areas and shorter stretches have safer bike-friendly routes. Confirm with local outfitters about recommended cycling paths.
Water taxis do not serve Key Largo in the way they serve more urban waterfront cities, but many dive operators, fishing charters, and eco-tour companies provide boat-based transportation to specific sites. Coordinates with your tour operator for pickup logistics.
Where to Stay
Accommodation in Key Largo ranges from large waterfront resorts with dive shops, marinas, and pools on-site, to mid-range motels, vacation rental cottages, and a campground within John Pennekamp Coral Reef State Park. Staying at a property with direct water access or a marina is convenient if your primary activities are diving, snorkeling, or fishing.
Vacation rental platforms list numerous private homes and cottages, some with boat docks — a practical option for groups or extended stays. Prices vary significantly by season; the period between Christmas and New Year and spring break (March) typically commands peak rates. Book well in advance for holiday periods.
For those on a tighter budget, the mainland communities of Homestead and Florida City offer considerably lower accommodation prices, with Key Largo accessible as a day trip — though the daily drive along US-1 adds time.
Verify current availability, amenities, and pricing directly with properties or booking platforms, as this market changes frequently.
Things to See & Do
John Pennekamp Coral Reef State Park
This is the centerpiece attraction of Key Largo. The park encompasses approximately 70 nautical square miles of Atlantic Ocean and offers snorkel tours, scuba diving, glass-bottom boat tours, kayak rentals, and camping. The famous nine-foot bronze Christ of the Abyss statue rests on the seafloor at Key Largo Dry Rocks — a popular snorkel and dive site. Verify current park fees, hours, and tour availability at the official Florida State Parks website.
Diving and Snorkeling
Beyond Pennekamp, the Florida Keys National Marine Sanctuary encompasses extensive reef systems accessible from Key Largo. Numerous dive operators along US-1 offer guided reef dives for all certification levels, as well as introductory resort courses for beginners. Wreck diving is also popular — the Spiegel Grove, a decommissioned US Navy vessel deliberately sunk to create an artificial reef, is one of the larger dive wrecks in the continental United States.
Fishing
Key Largo is a well-established sport fishing destination. Options range from offshore deep-sea fishing for mahi-mahi, sailfish, and tuna to backcountry and flats fishing for bonefish, tarpon, and permit. Half-day and full-day charters are available from multiple marinas; verify current availability and pricing with operators directly.
Kayaking and Paddleboarding
The backcountry mangrove creeks and Florida Bay side of the island offer sheltered, calm-water paddling well suited to kayaks and paddleboards. Several outfitters rent equipment and run guided eco-tours through mangrove tunnels and into the backcountry.
Wildlife and Nature
- Florida Bay and the backcountry are habitat for manatees, American crocodiles, bottlenose dolphins, and extensive birdlife including osprey, roseate spoonbills, and herons.
- The Crocodile Lake National Wildlife Refuge, located on the northern end of Key Largo, is one of the primary nesting areas for the endangered American crocodile; access is limited — verify any guided tour options locally.
Food & Drink
Key Largo's dining scene is primarily casual and seafood-focused. Grouper, hogfish, mahi-mahi, shrimp, and stone crab (seasonally, roughly October through May) appear on most menus. The culinary style blends Florida coastal cooking with Caribbean and Cuban influences common throughout the Keys.
Waterfront tiki bars are a local institution — open-air, informal, and typically serving cold beer, rum drinks, and fish tacos alongside views of the water or marina. Dress codes are essentially nonexistent at most casual spots.
For a more sit-down experience, several restaurants along US-1 serve fresh local catches alongside standard American and international fare. Options for vegetarians and those with dietary restrictions exist but are more limited than in a larger city — it is worth reviewing menus in advance if you have specific requirements.
Key lime pie is a Florida Keys staple; by tradition the authentic version uses key lime juice and a graham cracker crust. Most local bakeries and restaurants serve their own version — trying multiple interpretations is something of an informal local tradition.
Practical Information
Money and Payments
Credit and debit cards are widely accepted throughout Key Largo. ATMs are available but less numerous than in a city — it is practical to carry some cash for smaller vendors, boat tips, and informal markets.
Connectivity
Cell service from major US carriers is generally reliable along US-1 through Key Largo, though it can be intermittent in more remote backcountry areas on the water. Most hotels and many restaurants offer Wi-Fi.
Emergency Services
For emergencies in the United States, dial 911. The nearest full-service hospital is north of Key Largo in Homestead or Miami — confirm the address of the closest urgent care facility with your accommodation upon arrival. The US Coast Guard monitors VHF Channel 16 on the water.
Fuel and Supplies
Gas stations and grocery stores are present along US-1 in Key Largo. Prices for goods tend to be higher than on the mainland — stocking up in Homestead or Florida City before entering the Keys is a common strategy for longer stays.
Tipping
Standard US tipping practices apply: 18–20% at restaurants, $1–2 per drink at bars, and tipping your boat captain and crew on dive or fishing charters is customary and appreciated — verify what is typical with your specific operator.
Safety
Key Largo is generally a safe destination for tourists. The primary safety considerations are environmental rather than crime-related.
On the water: Always wear a life jacket when required, heed weather forecasts before heading offshore, and let someone know your float plan if you are boating independently. The Gulf Stream and ocean currents in this area are powerful — drift diving and snorkeling should only be undertaken with a knowledgeable guide or after thorough local briefing. Dehydration and sunburn are common hazards on full-day water excursions.
Marine environment: Do not touch coral — even incidental contact damages it and can cause cuts that become infected. Be aware of jellyfish, fire coral, and sea urchins. Lionfish are an established invasive species in the reef — their spines are venomous; leave them alone.
Hurricane preparedness: If visiting during hurricane season, monitor the National Hurricane Center (nhc.noaa.gov) forecasts. The Florida Keys have limited evacuation routes — if a hurricane watch is issued for the area, follow all official evacuation orders promptly. US-1 is the only road out, and delays can be severe.
Wildlife: American crocodiles are present in some areas; observe from a distance and do not feed or approach them.
