The Muzaffarpur–Gorakhpur line via Narkatiaganj and Motihari is a railway line connecting Muzaffarpur in the Indian state of Bihar to Gorakhpur in Uttar Pradesh.

The 309.720 km (192 mi) line passes through the plains of North Bihar and the Gangetic Plain of Bihar and Uttar Pradesh.

The foundation stone of doubling of railway line and electrification was laid by the hon'ble Prime Minister Modi on his trip to Motihari on the centenary celebration of the Champaran Satyagrah in 2018.

Modi flags off train, kick-starts track doubling, dedicates loco unit to nation in Bihar.

The doubling work survey for Muzaffarpur–Gorakhpur main line was sanctioned in the Railway Budget of 2012–13.