Dry Tortugas National Park

Dry Tortugas National Park sits at the far western end of the Florida Keys, a chain of islands formed by ancient coral reefs that grew during periods of higher sea levels and were exposed when sea levels fell. The seven islands of the Dry Tortugas are low-lying sand and coral rubble islands, with the largest, Garden Key, containing roughly 16 acres. The surrounding waters contain some of the healthiest coral reef ecosystems in the Florida Keys, with over 30 species of corals and hundreds of fish species. The reef system is part of the Florida Reef Tract, the third-largest coral reef system in the world, stretching from the Dry Tortugas to Miami. The park's remote location, 70 miles from Key West and beyond the reach of most human activity, has helped preserve the reef in better condition than reefs closer to populated areas. The waters surrounding the park are designated as a Research Natural Area, where fishing and extractive activities are prohibited, allowing marine life to thrive. Sea turtles, including loggerhead, green, and hawksbill species, nest on the park's beaches, and the surrounding waters are critical habitat for nurse sharks, tarpon, and numerous reef fish species.

Snorkeling and diving are the primary activities at Dry Tortugas, with the coral reefs surrounding the fort offering excellent opportunities to see tropical fish, coral formations, and shipwrecks. The moat wall around Fort Jefferson provides easy snorkeling access, and the nearby Windjammer wreck, a 19th-century steel-hulled vessel, is a popular dive site. Birdwatching is exceptional, particularly during spring migration, when the islands serve as a critical stopover for birds crossing the Gulf of Mexico. Bush Key, adjacent to Garden Key, hosts a large sooty tern nesting colony from March through September, with roughly 80,000 birds, and the area is closed to visitors during nesting season. Exploring Fort Jefferson is a highlight, with self-guided tours through the massive structure, including the gun ports, casemates, and the parade ground. The fort's magazine and several bastions offer interpretive panels about the fort's history and the prisoners held there. For visitors staying overnight, the campground on Garden Key offers sites with picnic tables and grills, and the nighttime sky over the remote islands is spectacular, with minimal light pollution and excellent stargazing and Milky Way viewing.

Dry Tortugas National Park is accessible only by boat or seaplane, with no road access. The most common way to visit is via the Yankee Freedom III ferry, which departs daily from Key West, taking roughly 2.5 hours each way and providing roughly 4.5 hours on the island. The ferry costs approximately $200 per person, including breakfast, lunch, snorkeling gear, and a fort tour. Seaplane service is available from Key West through Dry Tortugas Air, offering half-day and full-day trips, with costs starting around $350 per person. Private boats can visit the park, but the journey requires careful planning and experience navigating the shallow reef, and a mooring or anchoring permit is required. The park has no entrance fee, but the cost of transportation makes it one of the most expensive national parks to visit. Camping on Garden Key is available for $15 per night, with a limited number of sites available on a first-come, first-served basis, and campers must bring all their own water, food, and supplies, as no services are available on the island. The campground has primitive toilets but no showers, fresh water, or food service. Visitors should bring sun protection, as the islands are entirely exposed with virtually no shade.

Dry Tortugas National Park is a year-round destination, but seasons dramatically affect conditions and access. Winter and spring are the best times to visit, with moderate temperatures, lower humidity, and calmer seas. Spring brings the peak of bird migration, with large numbers of songbirds and raptors stopping on the islands in April and May. Summer is hot and humid, with temperatures in the 90s and a high heat index, and conditions can be uncomfortable for visitors unaccustomed to the tropical climate. Hurricane season runs from June through November, and the park can be closed with little notice if a storm approaches. Fall offers fewer crowds but higher risk of storms and rougher seas, which can cancel ferry and seaplane trips. Fort Jefferson's history is a key part of the park experience, with the fort construction beginning in 1846 to protect Gulf of Mexico shipping lanes. The fort was never fully completed, as advancements in artillery rendered its design obsolete, and it was used as a prison during and after the Civil War. Dr. Samuel Mudd, who set the broken leg of John Wilkes Booth, was imprisoned at Fort Jefferson from 1865 to 1869 and was pardoned by President Andrew Johnson after his efforts during a yellow fever epidemic at the fort.