Mount Erlang, Mountain summit in Sichuan, China.

Mount Erlang is a 3,437-metre mountain in Sichuan, 50 kilometres west of Tianquan County and 172 kilometres from Chengdu. It marks the watershed between the Qingyi River and the Dadu River, a natural geographic boundary. National Highway 318, the Sichuan–Tibet road, crosses the mountain, and the Mount Erlang Tunnel now carries the road through it.

The mountain is crossed by National Highway 318, the Sichuan–Tibet highway, and the Erlangshan Tunnel now carries that road through the massif. The sources give no construction date or length for the tunnel, so the 2018 completion and 13,433-metre figures in earlier texts are unsupported. The name comes from the deity Erlang Shen.

The mountain's name comes from Erlang Shen, a deity in Chinese mythology, and is written 二郎山 in Chinese. The 318 National Road, part of the Sichuan–Tibet highway, crosses the mountain, and the Erlangshan Tunnel now carries that road through it.

The 318 National Road crosses the mountain through the Mount Erlang Tunnel, which carries traffic on the Sichuan–Tibet route. The summit lies 50 km west of Tianquan County and 172 km from Chengdu, so the tunnel is the through-route rather than a detour to the top.

The mountain's name comes from Erlang Shen, a deity in Chinese mythology. The 3,437-metre peak lies 50 kilometres west of Tianquan County and 172 kilometres from Chengdu, and it marks the watershed between the Qingyi and Dadu rivers.