The Hoggar Mountains, also known as the Ahaggar, are a highland region in the central Sahara, southern Algeria, along the Tropic of Cancer

This mountainous region is located about 1,500 kilometres (930 mi) south of the capital, Algiers. The area is largely rocky desert with an average elevation of more than 900 metres (3,000 ft) above sea level. The highest peak, Mount Tahat, is at 2,908 metres (9,541 ft). Assekrem is a famous and often visited point where Charles de Foucauld built a hermitage in 1911.The main city near the Hoggar Mountains is Tamanrasset, built in a desert valley or wadi

The Hoggar Mountain range is chiefly volcanic rock and contains a hot summer climate, with a cold winter climate (temperatures fall below 0 °C (32 °F) in the winter). The mountains are young—about 2 million years old. Rainfall is rare and sporadic. However, since the climate is less extreme than in most other areas of the Sahara, the Hoggar Mountains are a major location for biodiversity and host relict species. The Hoggar Mountains are part of the West Saharan montane xeric woodlands ecoregion. It is also one of the national parks of the country