Over 40% of Virgin Islands National Park is underwater. Mangrove shorelines, seagrass beds, fringing and patch reefs offer an ample and diverse array of snorkeling opportunities. However, defining the 'best' is highly subjective, based on factors such as individual snorkeling/swimming abilities, water and wind conditions and the marine life particular to a given site. This guide describes a variety of potential snorkeling areas so that you can determine what's best for your own interests and expertise. It highlights areas easily accessed by road or trail and is not intended to be a comprehensive guide to all St. John snorkeling spots. A simple internet search will provide you with a list of other guides.