The Best Dry Tortugas Hikes for Every Skill Level

By David Sanchez · Data: National Park Service · ← Complete guide Dry Tortugas

Dry Tortugas isn't a park for hikers chasing elevation gain. It's an archipelago of seven coral islands 68 miles west of Key West, reachable only by ferry or seaplane, with most of its territory underwater. You won't walk far here, but there's plenty to explore: follow the moat around a 19th-century brick fort, climb onto its ramparts for a 360-degree view over the Caribbean's turquoise waters, and walk across to a bird island when the sandbar is exposed.

If you only do one hike, make it the Fort Jefferson outer moat loop on Garden Key. It's a flat, 0.9-mile walk that's easy for everyone, with the red-brick fort rising from the water behind you. To round out the day, walk the ramparts, circle the island, and, if you're visiting from October through January, cross on foot to Bush Key.

Dry Tortugas is valuable because it combines hiking, snorkeling, history, and birding. The hike is short, but you can fill an entire day with memorable experiences. Here's how to plan it.

Planning Your Dry Tortugas Hike

Permits and Entrance Fees

Admission is $15 per person and is usually included in the Yankee Freedom III ferry ticket from Key West. Holders of an America the Beautiful pass enter free. You don't need an additional permit for day hiking on the park's trails.

Dogs

Dogs are not allowed in the park, on the trails, or on the beaches. There are no exceptions.

Water and Supplies

There are no drinking-water sources in the park. The ferry provides an included lunch, but if you arrive by private boat or seaplane, bring at least 2 liters of water per person for a half day of exploring. That's not a comfortable recommendation. It's the bare minimum in 86°F heat and 80% humidity.

Wildlife and Safety

The reefs around the islands are home to stingrays. When you enter the water from the beach, shuffle your feet along the bottom instead of lifting your heels. The movement sends them away instead of startling them. On Garden Key's trails, brown pelicans and masked boobies nest just a few feet from the path and aren't easily frightened. Still, keep your distance. It's prohibited to approach a nest within 23 to 26 feet.

Bush Key is a protected nesting area for sooty terns and brown noddies, so it's closed from February through October. You can only walk there from October through January.

Heat and Weather

The climate is subtropical. From June through November, isolated thunderstorms often roll in during the early afternoon. In summer, temperatures reach 90 to 95°F, with high humidity. On a flat island without natural shade, sun protection is essential. Wear a hat and use at least SPF 50 sunscreen. The monthly averages for Dry Tortugas will help you anticipate conditions.

The Best Hikes, Island by Island

Garden Key: The Heart of the Park

This is Dry Tortugas' signature hike. The trail follows the hexagonal moat around Fort Jefferson, begun in 1846 and never fully completed. The red-brick walls stand out against the blue-green water and are a spectacle in their own right. The route is flat, with some shade from trees at the base of the walls, and strollers can manage it, although there are a few yards of loose sand. Start at Garden Key's main dock, 164 feet from the ferry exit.

For the best timing, do this loop as soon as the ferry arrives, around 10:30 a.m., before the heat sets in. During a January visit, I walked the loop in the opposite direction, and the late-morning backlight on the bricks was much prettier than the midday light.

Stairs inside the fort lead to this trail, which offers the park's best view. On a clear day, you can see all seven islands in the archipelago, look down through the reefs, and, if you're lucky, spot pelicans flying low over the water. The parapets aren't protected by a railing, so the walk can be tricky with toddlers. Wear shoes with flat soles. Binoculars are useful for birds overhead.

Leave the fort on the east side and follow the beach to the campground dock, then return along the lagoon side. The vegetation is low, but you'll see tricolored herons, a few campers, and a small historic cemetery with sailors' gravestones from the 19th century.

This quiet, slightly melancholy spot is easy to miss and completely ignored by hurried tour groups. It's often the best moment of the day.

Bush Key: The Bird Island

Crossing to Bush Key Distance: 0.3 to 0.5 miles depending on the sandbar · Elevation gain: none · Duration: 15 to 20 min · Difficulty: easy · Type: out and back · Access: October through January only

When the sandbar connecting Garden Key and Bush Key is exposed at low tide, you can walk across, almost entirely on dry ground. Outside nesting season, the island is quiet, edged by an almost pristine beach, and offers a different angle on the fort. During breeding season, when it's closed to the public, Bush Key hosts one of the largest colonies of sooty terns in the North Atlantic, with about 80,000 birds. Even when closed, it's visible and audible from Garden Key's east beach. Start at Garden Key's east beach.

Loggerhead Key: For Private Boat Access

Loggerhead Lighthouse Trail Distance: about 1.2 miles · Elevation gain: none · Duration: 45 min · Difficulty: easy · Type: out and back · Access: private boat or kayak only

Loggerhead Key lies 3.4 miles west of Garden Key. The ferry doesn't go there. The trail follows the coastal vegetation to the lighthouse, built in 1858 and one of the oldest still operating in Florida. The island is home to sea turtles that come ashore to lay eggs from June through September. Follow the marked nesting areas strictly. This lightly visited extension is ideal if you've arrived in your own boat. The guide Getting Around Dry Tortugas explains the available boating options.

Easy, Family-Friendly Hikes

All the trails on Garden Key work well for families with young children. They're flat, free of overgrown vegetation, and the longest trail, the island loop at 1.4 miles, takes no more than an hour. Strollers can handle the fort's outer path and the beach, but uneven floors and steps make the fort's interior passageways difficult to navigate.

What makes the day complete for kids is snorkeling in the moat by the fort's main entrance, where parrotfish and spiny lobsters live in shallow water, exploring the shaded interior of the fort, and watching birds from the ramparts. Plan on an hour of walking and about as much snorkeling for a full half day.

The guide Dry Tortugas with Kids covers kid-friendly activities and specific precautions for snorkeling with minors.

Beyond the Trails: When You Want to Go Farther

Dry Tortugas doesn't have a difficult trail in the traditional sense. If you're looking for a more demanding physical challenge, exploring the water is the natural next step. The reefs around the fort and the waters off Bush Key are among the most pristine snorkeling sites in the Gulf of Mexico, with visibility often reaching 33 to 49 feet, healthy coral, and regular sightings of groupers, rays, and sea turtles.

Experienced paddlers can sea kayak from Garden Key toward the neighboring islands of East Key and Middle Key, but currents between the islands can be strong, and you shouldn't underestimate the crossings. Our Getting Around page explains the options for renting water equipment.

For birders, Dry Tortugas' birdlife is far richer than what you'll see from the trails alone. Our guide to species to spot in Dry Tortugas lists seasonal sightings.

Access, Trailheads, and Transportation

There is no parking in the park, so your car stays in Key West. Public motorized access is available only via the Yankee Freedom III ferry, which leaves daily around 8 a.m. and returns around 5:30 p.m. from Key West's Historic Seaport. Key West Seaplane Adventures offers 35-minute flights instead of the 2-hour-15-minute ferry ride. They're more expensive, but useful for short visits or camping.

All trails start within 328 feet of Garden Key's main dock. There is no island shuttle and no bike or golf-cart rental. Private boats can anchor in the Garden Key channel.

The guide Getting to Dry Tortugas provides complete schedules, 2025 fares, and options based on your departure point.

When to Hike in Dry Tortugas

The ideal window is October through January, with moderate temperatures of 72 to 81°F, calmer seas, and access to Bush Key. December and January offer the most stable conditions, but ferry crossings can be canceled in bad weather when swells exceed 5 feet.

From April through June, the weather is still tolerable, and birds nest in large numbers on Bush Key, which is closed but visible from the beach. From June through September, heat and humidity make hiking strenuous by 11 a.m., and late-afternoon thunderstorms are common.

The guide When to Visit Dry Tortugas explains month-by-month weather probabilities and crossing conditions.

Which Hike Is Right for You?

Here's the advice we always give: if you're visiting for the day by ferry, don't try to do everything. Choose two activities, such as hiking and snorkeling or hiking and touring the fort, and take your time in 86°F heat. It's more enjoyable and more memorable than a marathon between full sun and single-file tour groups.

Our complete Dry Tortugas guide covers all available activities and helps you build an itinerary around the time you have on the island.

Frequently Asked Questions