After Thessaly Railways completed the construction of the 1,000 mm (3 ft 3+3⁄8 in) metre gauge lines from Volos to Larissa and Kalampaka (1886) they decided to extend their network eastwards, to connect Volos with the communities of Pelion Peninsula.

Due to limited space and mountainous terrain they decided to build this extension in 600 mm (1 ft 11+5⁄8 in) narrow gauge.

From Anavros to Agria and Lechonia the line has no special features, most notable being the concrete bridge over River Vrychon.

Turntables were installed at Volos and Mileai, the latter being replaced recently with a new one of larger diameter to accommodate the diesel locomotives.

[2] The stations of Ano Lechonia and Agria, which had been severely damaged by earthquakes, were restored according to the original designs.