Cumberland Island has no bridge and no car access for visitors — the only way over is a passenger ferry from the little town of St. Marys, Georgia. That's exactly what keeps it wild, and it means the trip takes a bit of planning.
The Ferry From St. Marys
The Cumberland Island Ferry runs from St. Marys, GA across the sound to the island's south-end docks — about a 45-minute ride, with typical departures around 9:00 a.m. and 11:45 a.m. and afternoon returns. Seats are limited (around 145), so reserve ahead; the park caps the island at roughly 300 people at a time and does not accept cash.
Getting to St. Marys
St. Marys sits in Georgia's far southeast corner, just off I-95 near the Florida line. The nearest major airport is Jacksonville, Florida (JAX), about 45 minutes south; Savannah is a couple of hours north. You'll drive to St. Marys, park at or near the visitor center, and leave the car behind — it doesn't come across.
No Cars, No Stores
There are no roads for visitor vehicles on the island and no shops, restaurants, or water for sale (outside the Greyfield Inn). You get around on foot or by bike (rentals near the dock), and you carry in everything you'll need. It's the price of admission to one of the wildest islands on the coast.
When to Go
Spring and fall are ideal — mild weather, fewer bugs. Summer is hot, humid, and buggy (and sea-turtle nesting season); winter is quiet and cool. Whenever you go, book the ferry as far ahead as you can, especially for weekends and holidays.
There's no bridge — the only way over is the ferry from St. Marys, and it's capped (about 145 seats, ~300 people allowed on the island at once), so reserve ahead and it does not take cash. There are no stores, food, or water for sale on the island (outside the Greyfield Inn), so bring all the water, food, and supplies you'll need for the day.
Everything hinges on the boat: reserve it early, be at the St. Marys visitor center in good time, and watch the return schedule closely — miss the last ferry and you're stuck. Build the day around the crossings.
Handy for the ferry and a day with no services.
THE EARNEST TRAVELER