Azufral
Volcán Azufral
Azufral in 1989
Highest point
Elevation	4,070 m (13,350 ft)[1]
Listing	Volcanoes of Colombia
Coordinates	1°05′N 77°41′W / 1.083°N 77.683°W / 1.083; -77.683[1]
Geography
Azufral Location of Azufral in Colombia
Location	Nariño  Colombia
Parent range	Western Ranges  Andes
Geology
Rock age	Holocene
Mountain type	Stratovolcano
Volcanic arc/belt	Northern Volcanic Zone, Andean Volcanic Belt
Last eruption	930 BC(?)[1]

Azufral is a stratovolcano located in the department of Nariño in southern Colombia, 12 km (7 mi) west of the town of Túquerres. It is the only volcano of the Western Ranges of the Colombian Andes. Its name derives from the Spanish word for sulfur, azufre. 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). The lake is 1,100 m (0.68 mi) long and 600 metres (2,000 ft) wide.^[2] and its bright green color is a result of the sulfur and iron-based deposits in the crater. There are also two other much smaller lakes in the crater, Laguna Negra (English: Black Lake) and Laguna Cristal (English: Crystal Lake).

The volcano lies within a nature reserve, the Reserva Natural del Azufral, created in 1990.^[2] The reserve covers an area of 5,800 hectares (58 km²) and is free of charge to enter. 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.

• List of volcanoes in Colombia
• List of volcanoes by elevation