Cayo Costa: The Unbridged Gulf Island Where Shells Outnumber Footprints

Nine miles of white sand beach, zero roads, and not a single building you didn’t bring with you. Cayo Costa State Park sits between Pine Island and North Captiva off the Lee County coast, and getting there requires a boat, a ferry, or a kayak. That’s exactly the point.

An Island Unchanged

Cayo Costa covers 2,506 acres of Gulf barrier island, making it one of the largest undeveloped islands in Florida. The Calusa people lived here for centuries before Spanish explorers arrived, and the island has remained remarkably untouched since. No bridges connect it to the mainland. No condos line the shore. The only structures are a handful of rustic cabins, a few primitive campsites, and a small ranger station. The beach faces the open Gulf, and on most days you’ll share it with shorebirds, not people. Shelling here rivals Sanibel, especially after a good storm pushes fresh specimens onto the sand.

What You’ll Find

Beyond the beach, Cayo Costa has pine flatwoods, mangrove swamps, and oak hammocks threaded with hiking trails. The bay side offers calm, shallow water perfect for kayaking and paddleboarding, while the Gulf side delivers the surf and the shelling. Dolphins patrol the passes on either end of the island, and manatees drift through the mangroves in warmer months. The snorkeling is solid off the southern point, where the water stays clear and sea life clusters around submerged structure.

Getting There and Staying Over

Tropic Star ferry runs daily service from Pine Island (Bokeelia) to Cayo Costa, about a 30-minute ride. You can also launch a kayak from Pine Island or Captiva. The park has 12 primitive cabins and 30 tent sites, all of which book up fast during peak season (November through April). There’s no running water or electricity in the cabins, so pack accordingly: cooler, water, flashlight, and a willingness to unplug. Day visitors can catch a morning ferry, spend the day beachcombing, and return by afternoon. The park entrance fee is $2 per person, plus the ferry fare.

Official page: Cayo Costa State Park