Florida Keys

Overview

The Florida Keys are the payoff of the Overseas Highway drive—113 miles of islands, bridges, and teal water stitched together on the old Overseas Railroad corridor. It’s a choose‑your‑own‑adventure: quick viewpoints and beaches, or full days of snorkeling, museums, and wildlife encounters.

Why it’s special

You’re driving through the largest coral‑reef access on the U.S. mainland, with tropical savanna vibes and a real chance to spot American crocodiles, alligators, and—down in the Lower Keys—endangered Key deer. Add long bridges (hello, Seven Mile) and you’ve got one of America’s great coastal road trips.

A bite of history

Touring the Keys by car started as an idea in 1921 and became reality in 1928 as State Road 4A, with a big ferry gap in the middle. After the 1935 Labor Day hurricane wrecked the railroad, the state bought the roadbed and bridges and began replacing ferries with automobile bridges. Modern upgrades followed, including wider sections and new bridges in the 1970s.

How to navigate

Mile markers (MM) are your compass—MM 0 in Key West to roughly MM 106 in Key Largo. Addresses often match the nearest tenth of a mile. A handy quirk: odd numbers usually mean oceanside, even numbers bayside (with a few exceptions). Use markers to time stops and meet‑ups.

Standout stops (north to south)

• John Pennekamp Coral Reef State Park (Key Largo): classic snorkeling, glass‑bottom boats, paddling.
• Windley Key Fossil Reef Geological State Park (Islamorada, MM 84.9): walk a fossil reef quarry tied to the old railroad.
• History of Diving Museum (Islamorada): compact, weather‑proof maritime fix.
• Robbie’s of Islamorada: dockside tarpon feeding plus kayak/SUP rentals.
• Anne’s Beach (Lower Matecumbe): boardwalks and shallow wading.
• Long Key and Curry Hammock State Parks (Middle Keys): quieter beaches, paddling, birding.
• Dolphin Research Center and Florida Keys Aquarium Encounters (Marathon area): marine‑life education.
• Crane Point Hammock and The Turtle Hospital (Marathon): hammock trails and sea‑turtle rehab tours.
• Bahia Honda State Park (near Big Pine): photogenic beaches and easy snorkeling.
• National Key Deer Refuge (Big Pine Key): respectful chance to see Key deer near habitat trails.
• Key West: architecture, museums, water tours, and sunset at Mallory Square.

Amenities and pit‑stop intel

You’ll find restrooms and parking most reliably at state parks, beaches, museums, and in town centers—fees or tickets may apply and hours vary. Example clusters: Upper Keys around John Pennekamp; Islamorada near the museum and beaches; Marathon around Curry Hammock, Dolphin Research Center, and the Turtle Hospital; Lower Keys at Bahia Honda before you roll into Big Pine and Key West. Gas stations and groceries fill the gaps. Do not stop on bridges—use signed pullouts, parks, or towns.

Wildlife etiquette

Drive carefully on Big Pine Key; Key deer often cross near dawn and dusk. In the water, book tours early, use reef‑safe sunscreen, and never touch coral or seagrass.

Best time to visit

Aim for mornings: cooler light, smaller crowds, and you’ll dodge the common afternoon sun and storms. Time a southbound day to land in Key West for sunset; if you’re chasing wildlife, early and late light are your best windows.