Azufral is a stratovolcano located in the department of Nariño in southern Colombia, 12 km (7 mi) west of the town of Túquerres.

The volcano is considered semi-dormant but there are numerous fumaroles in the summit crater.

The summit of the volcano has an altitude of 4,070 metres (13,350 ft),[1] and the north-western side of the crater contains a crescent-shaped lake named Laguna Verde (English: Green Lake) at 3,970 m (13,025 ft).

[2] and its bright green color is a result of the sulfur and iron-based deposits in the crater.

As Azufral is semi-dormant, there are no restrictions on ascending the volcano and visiting Laguna Verde: there is a road that climbs to within 1.5 kilometers (1 mi) from the summit, and the remaining distance can be covered on foot via a trail.