Florida Keys Road Trip: Miami to Key West on the Overseas Highway

Before you go: how the drive really works

The Florida Keys are one road. US-1, the Overseas Highway, is measured in green mile markers (MM) that count down from MM126 in Florida City to MM0 in Key West, and locals give directions by mile marker, not street address. Set your trip up so you drive south with the water on both sides and the sun over your shoulder in the morning. You need a rental car for this trip; there is no practical alternative once you leave Miami. Fill the tank before Florida City because gas gets pricier the farther down you go.

Plan on 4 days and 3 nights to do it without rushing. If you only have a long weekend, the same route compresses into 2 nights with less time in the water. The best window is the dry season, roughly November through April, when humidity drops and cold fronts occasionally cool the water for a day. Summer is hot with near-daily afternoon storms that usually clear in an hour, but water clarity on calm mornings can be excellent. For the full mile-by-mile breakdown of bridges, fuel stops, and where the cell signal drops, read our guide to driving the Overseas Highway, and see the Florida Keys region overview for how the island chain fits together.

Day 1: Miami to Key Largo (about 1 hour, 60 miles)

Leave Miami early and you are in Key Largo, MM106, in about an hour. This is the dive capital of the chain, and the reason is John Pennekamp Coral Reef State Park, the first undersea park in the country. The park runs snorkel trips out to the living reef three miles offshore, and the shallow patch reefs mean even first-timers see brain coral, parrotfish, and the famous submerged Christ of the Abyss statue. Half-day snorkel tours run roughly $35 to $45 per adult plus gear rental, and morning departures beat the afternoon wind.

Base yourself at Gilbert's Resort & Marina at MM107.9, a low-key waterfront spot right where US-1 meets Jewfish Creek with its own tiki bar, boat slips, and live music most nights. It puts you on the water for sunset without a drive. For dinner, the Keys run on fresh fish and key lime pie, so order both. Spend the evening on the dock watching the boats come in, then turn in early because Day 2 is the reef and the tarpon. Gilbert's own tiki bar handles a casual first-night dinner, and the fried fish and key lime pie there are exactly what you came for.

Day 2: Key Largo to Islamorada (about 30 minutes, 20 miles)

Islamorada, the self-described sport-fishing capital of the world, is a short 20-minute hop south. Your first stop is Robbie's of Islamorada at MM77.5, where for a couple of dollars in a bucket of baitfish you can hand-feed 100-pound tarpon that hang under the docks. It is touristy and it is worth it. Robbie's also books backcountry fishing charters, kayak rentals, and boat tours to nearby sandbars, so this one marina can fill half a day.

Islamorada is where you decide what kind of Keys traveler you are. Anglers should book a half-day flats or offshore charter here; the shallow backcountry holds bonefish and permit, while the reef edge and Gulf Stream a few miles out give up mahi, sailfish, and snapper. Browse options on our Florida fishing charters page. Beach seekers should note the Keys are coral islands, not sand beaches, so the swimming is better on Day 3 at Bahia Honda than here. Read the full Islamorada guide before you go, and if you are running short on time you can push straight through to Marathon and sleep there instead.

Day 3: Islamorada to Bahia Honda and into Key West (about 2 hours with stops)

Today you cross the Seven Mile Bridge, the longest span on the route and the shot every road-tripper photographs. Before the bridge, stop in Marathon around MM50 for fuel, coffee, and the Turtle Hospital if you have kids. Just past the bridge sits Bahia Honda State Park at MM37, home to the best swimming beach in the entire chain: shallow, calm, and genuinely sandy, which is rare down here. Entry is about $8 per vehicle, and the old railroad bridge makes a good climb for the view. This is your beach day, so pack a picnic and give it a few hours. Compare it to the rest of the coast on our Florida beaches page. In Marathon, the Turtle Hospital runs guided tours on the hour and makes a good midmorning stop with kids before you cross the Seven Mile Bridge.

From Bahia Honda it is roughly 50 minutes into Key West, MM0, the end of the road. Check into Opal Key Resort & Marina at 245 Front Street, which puts you a two-minute walk from Mallory Square and the sunset celebration, where street performers and food carts fill the waterfront as the sun drops into the Gulf. That first night, keep it simple: walk Duval Street, eat conch fritters, and get to bed, because tomorrow you are back on the water.

Day 4: Key West on the water and the drive back

Give Key West a full morning on the water before you point the car north. Fury Key West Watersports at 631 Greene Street runs reef snorkel trips, jet ski island tours, and a popular sunset sail, and their combo tickets are the easy way to pack two activities into a half day. For a sailing-and-kayak day out to the backcountry mangroves and flats, Danger Charters at 255 Front Street runs small-group trips that get you away from the cruise-ship crowds. Anglers can book a half or full day with Gulfstream Fishing on Historic Charter Boat Row at 1801 N Roosevelt Boulevard, one of the longest-running party and charter fleets in town.

On land, cool off with a swim at Fort Zachary Taylor Historic State Park Beach, the best natural beach inside Key West, then knock out the classics: the Southernmost Point buoy, the Hemingway Home, and a slice of key lime pie. The drive back to Miami is the same 113 miles, about 3.5 to 4 hours, and it goes faster when you know the road. If you have more time to spend in Florida, fold this trip into a longer loop using our 7 days in Florida plan, or the full statewide 10 days in Florida route. For the big picture on planning a trip, start at the Florida travel guide.

Where to stay, what it costs, and where to eat

Lodging is the biggest line item down here, and rooms sell out months ahead in the dry season, so book early. Prices climb the farther south you drive. Figure roughly $150 to $250 a night in Key Largo and Islamorada in the shoulder months, and $250 to $450 or more in Key West through winter and on holiday weekends. Gilbert's Resort & Marina at MM107.9 keeps Day 1 on the water without the Key West markup, while Opal Key Resort & Marina at 245 Front Street puts you in the middle of Old Town for your two nights at the end of the road. If Key West rates run too high, sleep in Marathon around MM50 and drive in each morning, which trims the nightly cost and leaves you central to both Bahia Honda and the Seven Mile Bridge.

Food in the Keys is built on fresh fish, so order the catch of the day, conch fritters, and a slice of key lime pie wherever you stop. Open-air fish houses and marina bars beat anything fancy down here, and most run casual and cash-friendly. On your Key West water morning you have more options than the big reef boats. Sunset Watersports Key West and Sebago Watersports both run reef snorkel trips, kayak tours, and sunset sails, and serious anglers can book a full offshore day with Cowboy Cowgirl SportFishing Charters or the light-tackle backcountry crews at FishMonster & IslandJane Charters. Budget roughly $100 to $180 per person for a shared reef trip and several hundred for a private charter split among your group.

A few practical notes make the drive smoother. Cell signal drops on the long bridges, so download your maps and playlists before you leave Miami. Fuel up before Florida City, since gas gets pricier the farther down the chain you go. Book the Robbie's tarpon feeding, any charter, and your dry-season hotel nights well ahead, because the Keys fill up fast from December through April. For more on reef trips and where the diving is best, see our snorkeling and diving guide, and match your dates to the water and weather with the best time to visit Florida page.