Cayo Costa State Park

Cayo Costa State Park is a secluded barrier island located off the coast of Captiva, offering visitors a chance to experience undeveloped Florida coastline. Reachable only by private boat or ferry service, this 2,285-acre park preserves natural habitats ranging from sandy beaches to dense mangrove forests, making it feel like a true escape from the mainland.

The park's primary draw is its exceptional shelling opportunities, particularly along the gulf-facing beaches where visitors regularly find intact shells, sand dollars, and other treasures. The island also features several trails through maritime hammock and mangrove ecosystems, providing glimpses of native plants and birds in their natural habitat. A historic cabin and ranger station add to the park's rustic charm.

Visitors enjoy swimming, shelling, fishing, picnicking, and wildlife observation. The park maintains a no-development philosophy that has preserved its natural character for decades. Whether you're seeking a quiet day on an uncrowded beach or exploring coastal ecosystems, Cayo Costa offers a quintessential Florida island experience away from commercial development.

The park's remote location and limited accessibility help maintain its pristine condition, making it ideal for those willing to put in the effort to reach it via water.

Cayo Costa supports diverse coastal wildlife including sea turtles, dolphins, manatees, and numerous wading birds such as herons, egrets, and roseate spoonbills. The mangrove forests provide critical nursery habitat for fish and crustaceans, while the island's maritime hammock vegetation includes native palms, gumbo-limbo trees, and sea oats. Shellers will encounter abundant shells from both modern and archaeological deposits, reflecting the island's long natural and human history.

• Access is by private boat or ferry service only; plan transportation in advance as there is no bridge to the island • Bring plenty of fresh water, sunscreen, and supplies, as services are extremely limited on the island • Visit during cooler months (November through April) for the most comfortable conditions and fewer insects • Wear water shoes or sturdy footwear for navigating shell-covered beaches and sandy trails • Arrive early to secure good shelling spots and parking at the ferry departure point