Morne Diablotins is the highest mountain in Dominica, an island-nation in the Caribbean Lesser Antilles. It is the second highest mountain in the Lesser Antilles, after La Grande Soufrière in Guadeloupe. Morne Diablotins is located in the northern interior of the island, about 15 miles north of Dominica's capital Roseau and about 6 miles southeast of Portsmouth, the island's second-largest town.