The Khojak Tunnel (Urdu: خوجک سرنگ‎, Khojak Sarang), also known as Shela Bagh Tunnel, is a 3.91 km (2.43 mi) railway tunnel in the Toba Achakzai range in the Qilla Abdullah District of Balochistan province, Pakistan.
It is located 1,945 m (6,381 ft) above sea level.
The tunnel was constructed in 1891 under the Khojak Pass, and was featured on the old Five Rupee banknote.

The tunnel is one of the longest tunnels in South Asia, and was the longest in Pakistan until superseded by the 8.75 km (5.44 mi) Lowari Tunnel in 2018.
The Khojak Tunnel (Urdu: خوجک سرنگ‎, Khojak Sarang), also known as Shela Bagh Tunnel, is a 3.91 km (2.43 mi) railway tunnel in the Toba Achakzai range in the Qilla Abdullah District of Balochistan province, Pakistan. It is located 1,945 m (6,381 ft) above sea level. The tunnel was constructed in 1891 under the Khojak Pass, and was featured on the old Five Rupee banknote.
The tunnel is one of the longest tunnels in South Asia, and was the longest in Pakistan until superseded by the 8.75 km (5.44 mi) Lowari Tunnel in 2018.
Khojak Tunnel