The fort was originally constructed with mortar batteries named after soldiers who died in the Seminole Wars.
The park's beaches are frequently cited for their lack of development and are often ranked among the top natural beaches in the United States.
The island serves as a critical stopover for migratory birds traveling along the Atlantic Flyway.
Construction materials for the fort included shells and lime, which were susceptible to erosion from saltwater spray.
The park features a ferry service that provides direct access to the nearby Egmont Key State Park.
During World War II, the islands were utilized as a bombing range for Army Air Force personnel.
The park's North Beach features a 'tide pool' area formed by sandbars that create shallow, calm swimming conditions.
The mangroves lining the islands serve as a natural filtration system and nursery for local marine life.
Archeological evidence of Tocobaga Native American settlements has been documented on Mullet Key.
Fort De Soto Park is a 1,136-acre Pinellas County park comprising five interconnected islands: Madelaine Key, St. Jean Key, St. Christopher Key, Bonne Fortune Key, and the main island, Mullet Key. The site is anchored by the historic Fort De Soto, a coastal fortification constructed in 1898 during the Spanish-American War. Visitors can explore the preserved bunkers, batteries, and mortar emplacements that remain from the fort's active duty period. The park features seven miles of waterfront, including pristine stretches of Gulf of Mexico beaches and Tampa Bay shoreline. It is recognized as a significant bird sanctuary, with over 328 species identified within its boundaries. Recreational amenities include a 2,200-foot fishing pier, a boat launch, and a dedicated dog park with beach access. Extensive paved trails facilitate cycling and skating throughout the island network. The park is connected to the mainland via the Bayway Toll Bridge system.
The historic mortar battery ruins at the fort site during the golden hour for high-contrast architectural shots.
Bring polarized sunglasses to better spot marine life like stingrays and manatees in the shallow seagrass beds.
Rent a bicycle near the entrance to cover the vast multi-island trail system efficiently.
Arrive early during summer weekends, as parking lots for North Beach and the Fort area often reach capacity quickly.
Feeding the local wildlife, specifically the raccoons and birds, which disrupts their natural foraging behaviors.
Leash laws are strictly enforced outside the designated dog beach area; carry out all trash to protect fragile nesting habitats.
