Owned by Euskal Trenbide Sarea, it runs from Bermeo to Amorebieta, connecting with the Bilbao-San Sebastián mainline.

[2] That year, the government commissioned Francisco Rispa Perpiñá [ca] with the writing of the project for a railway between Gernika and Amorebieta, where it would link with the existing line.

After several delays, the project was transferred to Luis de Landecho [es], who in 1885 received government approval for the construction of the railway.

[4] On 15 March 1893, the line was extended to Pedernales (in Basque: Sukarrieta), only six months after the authorization for the construction was issued.

[6] Despite numerous proposals, the Mungia–Bermeo railway project ultimately didn't materialize due to the high costs involved.

After the failed takeover, relations between both companies worsened, and Ferrocarriles Vascongados actively pushed for the bankruptcy of the Amorebieta–Pedernales railway, by running direct buses to Bilbao.

By the time this happened in 1932, Ferrocarriles Vascongados lacked the financial resources needed for the management of the railway.

[7] Thus, the line was taken over by the government, which managed it under the company Explotación de Ferrocarriles por el Estado [es].

[14] The trains used to operate the line after the electrification were electric railcars that had belonged to the defunct Vasco-Navarro railway [es].

[17] From 1997 to 1998 a freight service was operated jointly with FEVE from Bermeo to Lutxana, but had to be suspended due to increased passenger traffic.