On the western St Lucia coast north of Soufriere, the snorkeling at Petit Trou is popular for rock formations and trenches. While snorkeling at Petit Trou, you may encounter large schools of barracuda and sergeant majors, along with the occasional sea turtle, in the 20 foot deep waters. This is mainly a boat accessed snorkeling dive site.
To reach the snorkeling on St Lucia by air, you will need to fly into either George Charles Airport (SLU) on the north end or Hewanorra International Airport (UVF) on the south end of the island. Since the roads on St Lucia can be in poor condition or even washed out depending upon rainfall, you may want to select an airport close to the set of snorkeling dive destinations you prefer on St Lucia. A rental car is recommended to access the north end dive sites, while a rental is not recommended for the south end.
In addition, there is a ferry called L'Express de Iles that interconnects Dominica, Guadeloupe, Martinique and St Lucia.
Overall, Petit Trou is the 8th most popular snorkel dive spot of all 10 snorkeling dives in St Lucia.