Camping at Dry Tortugas — Seventy Miles Off the Mainland, No Cell Service, Bring Water
There are ten tent sites on a small island reachable only by ferry or seaplane, surrounded by a 19th-century brick fortress and one of the most intact reef systems in the Caribbean. It's the most remote place in the continental U.S. you can sleep without backpacking. Here's how it actually works.
Seventy miles west of Key West, in water nobody can reach quickly, sits a 16-acre island called Garden Key. On it: a 19th-century coastal fortress built of 16 million bricks; a working lighthouse from 1858; ten primitive tent sites; and one of the most intact coral reef ecosystems still alive in the Caribbean.
This is Dry Tortugas National Park. It is the most remote place in the continental United States where you can sleep without being a backpacker.
You don’t drive there. You take a ferry from Key West (the Yankee Freedom, daily — book six weeks ahead in season) or you charter a seaplane. There is no other way.
Bring all your water. The park has none. There is no store, no spigot, no rescue if you forget.
What’s actually there
Fort Jefferson — a six-sided unfinished coastal fortress, the largest brick masonry structure in the Western Hemisphere. Built between 1846 and 1875 and never finished. Self-guided tours are free with park admission. The walls alone are worth the trip; the moat reef around the fort is one of the best easy snorkels in the park.
Garden Key reefs — patch coral and seagrass right off the beaches. Bring your own mask + snorkel; there’s no rental shop. Visibility in the shallows is 30-60ft. Tropical fish are dense. You’re snorkeling on a coral system that hasn’t been touched by mainland runoff because there is no mainland for seventy miles.
Loggerhead Key — the next island over, about three miles away. The 1858 lighthouse here is the historic one. Kayak-only access (no rentals — bring or rent in Key West and check with the ferry on transport). The reef on Loggerhead’s west side is widely considered the park’s best snorkel.
Star fort moat — the literal moat around Fort Jefferson is a snorkel circuit you can do in 45 minutes. Sergeant majors, parrotfish, the occasional small nurse shark on the sand.
Camping logistics
Ten tent sites. First come, first served. $15/night. No reservations.
The campground is on the south side of Garden Key, about 200 yards from the fort. Each site has a picnic table and a grill. Pit toilets nearby. No fresh water on the island. The ferry will hold your gear and transport up to 60 lbs per person — you must bring:
- Water: 1 gallon per person per day. Minimum.
- All food. Nothing to buy on the island, no resupply.
- Stove + fuel. Open fires not allowed.
- Trash bags. Pack everything out. The park doesn’t have trash service.
- Sun protection. No tree shade on the campground. Bring a tarp and rope.
- First aid + tools. Nearest hospital is 70 miles away by boat.
The ferry drops campers in the morning and picks them up on a designated day — book the return slot when you book the inbound.
When to go
November through April. Winter and early spring. Water is calm enough for the snorkel; the heat is bearable.
May through October is hurricane-shoulder and the wind kicks up. Some days the ferry doesn’t run. The campground gets buggy when the wind dies. Skip it.
The honest read
The ferry is $230 per adult, round-trip. The trip from Key West takes 2.5 hours each way — meaning if you day-trip, you have about four hours on the island. That’s enough to tour the fort and do one snorkel. It’s not enough to see the park.
Camp at least one night. The day-trippers leave at 3 PM and the island becomes yours. Sunset on Garden Key with the fort silhouetted is a thing. So is the stargazing — no light pollution within seventy miles.
If you can swing two nights, do that. One day to settle in and tour Fort Jefferson; one to kayak Loggerhead Key.
This is one of the rare places in the U.S. that genuinely feels remote. Hold onto it.
