Almost everyone takes a day trip to Buck Island aboard a charter boat. Most leave from the Christiansted waterfront or from Green Cay Marina and stop for a snorkel at the island's eastern end before dropping anchor off a gorgeous sandy beach for a swim, a hike, and lunch. Sailboats can often stop right at the beach; a larger boat might have to anchor a bit farther offshore. A full-day sail runs about $100, with lunch included on most trips. A half-day sail costs about $70.
Big Beard's Adventure Tours. From catamarans that depart from the Christiansted waterfront, you'll head to Buck Island for snorkeling before dropping anchor at a private beach for a barbecue lunch. Queen Cross St. Waterfront, Christiansted, Saint Croix, 00820. 340/773–4482; www.bigbeards.com.
Buck Island Charters. These charters are on two trimarans, Teroro II and Dragonfly, which leave Green Cay Marina for full- or half-day sails. Bring your own lunch. Green Cay Marina, Annas Hope, Saint Croix, 00820. 340/718–3161; www.gotostcroix.com.
Caribbean Sea Adventures. With their crafts leaving from the Christiansted waterfront, Caribbean Sea Adventures has both half- and full-day trips to Buck Island. Christiansted Boardwalk, Christiansted, Saint Croix, 00820. 340/773–2628; www.caribbeanseaadventures.com.