Morne aux Diables, Dormant volcano in northern Dominica.

Morne aux Diables is a dormant volcano in northern Dominica with a conical shape rising to approximately 861 meters. The slopes feature andesite rock formations, and sulfur springs emerge at several points along the mountain's flanks.

This volcano formed during periods of ancient volcanic activity and has remained dormant since the Pleistocene era. A minor seismic event between 2009 and 2010 indicated that geological activity continues beneath the surface.

The name Morne aux Diables, "Devil's Peak", is the French form still used on the island, alongside the Kweyol name Mòn a Dyab. On the south flank, the old crater area on Mont Bellevue is unofficially called Cold Soufrière, to distinguish it from the Grande Soufrière in southern Dominica. A dirt track links the hamlets of Delaford, on the windward side, and Guillet, on the leeward side, passing this zone at about 500 m altitude.

The hike requires sturdy footwear, water, and weather-appropriate clothing for the several-hour journey on the trail. Dense vegetation covers the slopes and provides shade, though solid boots are essential for navigating the uneven paths.

The lava dome inside the summit crater measures about 90 metres high and 335 metres wide, set within a crater roughly 1.2 km across. On the south side, a former crater area on Mont Bellevue, a spur of the volcano, is informally called Cold Soufrière to distinguish it from Dominica's southern Grande Soufrière.