Virgin Islands National Park

St. John's landscape is volcanic in origin, with steep hills rising from the sea and fringing coral reefs surrounding much of the island. The island's tropical dry forest is dominated by bay trees, kapok, and turpentine trees, with an understory of ferns and bromeliads. The reefs surrounding St. John are part of the larger Caribbean coral reef system, which is one of the most biodiverse marine ecosystems on Earth. The park's reefs include both fringing reefs close to shore and patch reefs farther out, supporting elkhorn and staghorn corals (both listed as threatened under the Endangered Species Act), brain corals, sea fans, and over 40 species of reef fish. The park's waters are also home to green and hawksbill sea turtles, both of which nest on St. John's beaches. Unfortunately, the reefs have suffered significant damage from warming waters, ocean acidification, coral bleaching events, and Stony Coral Tissue Loss Disease, an epidemic that has affected many Caribbean reefs since 2014. Park scientists and partners are actively working on coral restoration, including growing and transplanting resilient coral fragments.

Trunk Bay is the park's crown jewel, featuring a 225-yard underwater snorkeling trail with submerged plaques identifying fish and coral species. The snorkeling fee is $5 per person (cash) in addition to the park entrance fee. Cinnamon Bay, Maho Bay, and Francis Bay also offer excellent snorkeling and are popular with visitors and locals alike. The Reef Bay Trail is one of the park's most significant hikes: a 2.2-mile (one-way) guided or self-guided descent through tropical forest that passes petroglyphs left by the Taino people and ends at the Reef Bay sugar factory ruins, with an optional detour to a pristine beach. The Ram Head Trail is a rugged 1.5-mile round trip to a dramatic rocky promontory with sweeping views of the Caribbean. The Annaberg Sugar Plantation Trail is a short, 0.5-mile loop through the ruins of an 18th-century sugar mill, with interpretive signs detailing the plantation system and the lives of enslaved people. For snorkeling from shore, Waterlemon Cay (accessed via the Johnny Horn Trail from Cruz Bay) is considered one of the best spots in the park.

There is no airport on St. John; visitors fly to St. Thomas (Cyril E. King Airport) and take a taxi to the Red Hook ferry terminal or Charlotte Amalie, then a 20-minute ferry to Cruz Bay, St. John. The park entrance fee is $20 per person, valid for 7 days, or $50 for an annual pass; children 15 and under are free. The Cruz Bay Visitor Center is the main information hub and is where boaters register for mooring balls. The park has one campground at Cinnamon Bay, currently being rebuilt after hurricane damage; check current availability. Most visitors stay in Cruz Bay or Coral Bay in rental villas or small inns. Car rentals are available on St. John, but most park beaches are accessible by taxi from Cruz Bay. Mooring balls are available in several bays for boaters on a first-come, first-served basis with a fee. The park is open year-round, but ranger-led activities like the Reef Bay Guided Hike ($40 per person) have limited schedules and require advance booking at the visitor center.

St. John has a tropical climate with two distinct seasons. The dry season runs from December through April and is the most popular time to visit, with warm, sunny weather, low humidity, and calm seas — ideal for snorkeling and hiking. This is also the busiest season, and accommodations should be booked well in advance. The wet season (June through November) is warmer and more humid, with occasional rain showers, but is still a good time to visit for those who prefer fewer crowds. September and October are the least crowded months. Hurricane season officially runs from June 1 through November 30, with peak activity in September; visitors should monitor weather forecasts and consider travel insurance during these months. The water temperature ranges from about 79°F in winter to 85°F in summer, making snorkeling comfortable year-round. Sea turtle nesting season peaks from June through October, and bioluminescent bays are most dramatic during the new moon. Visitors should also be aware of the occasional presence of Portuguese man-of-war and sea urchins in the water.