The city ruins of Timgad are located in which mountain range?

Timgad was a Roman city in the Aurès Mountains of Algeria. It was founded by the Roman Emperor Trajan around 100 AD. The full name of the city was Colonia Marciana Ulpia Traiana Thamugadi. Emperor Trajan named the city in commemoration of his mother Marcia, eldest sister Ulpia Marciana, and father Marcus Ulpius Traianus.

Located in modern-day Algeria, about 35 kilometers (22 mi) east of the city of Batna, the ruins are noteworthy for representing one of the best extant examples of the grid plan as used in Roman town planning. Timgad was inscribed as a World Heritage Site by United Nations Educational, Scientific, and Cultural Organization (UNESCO) in 1982.

The Aures Mountains are a subrange of the Saharan Atlas in northeastern Algeria. The mountain range gives its name to the mountainous natural and historical region of the Aures. The Aures mountains are the eastern continuation of the Saharan Atlas. The highest peak in the Aurès mountain range is Djebel Chélia in Khenchela Province, which sits at 2,328 metres (7,638 ft).