The Eresma Valley Greenway Nature Trail follows the old rail tracks going from Segovia to Medina del Campo, which were active for more than 100 years. The restored route goes from Segovia to Olmedo and is divided into three sections of very similar length, with a total of 73 km. It can be enjoyed by bike or using any other non-motorised means of transport.
The path runs along the Eresma River and zigzags among the riverbank vegetation of its valley, the cereal crops caressed by the wind and the stands of resin pine (Pinus pinaster).
The train that linked Segovia to Medina del Campo was in operation from 1884 until 1993. The building of this route was not free from turmoil as it was initially one of the alternatives for the Madrid – Valladolid section, which belonged to the route known as the Northern Railway (Madrid – Irún). Rejected as a main option, it was built as a secondary line, although this characteristic was lost over the years, due to the fact that Segovia station was at the end of the line, forcing trains to reverse in. The Segovia – Medina del Campo section, the point chosen for the connection with the Madrid – Irún line, was inaugurated on 1 June 1884 and on 1 July 1888, it was joined up to the Villalba – Segovia stage.
The lack of passengers on this line owing to growing competition from road traffic meant that trains ceased to use this route in 1993. Fourteen years later, on 23 December 2007, the Madrid – Valladolid high-speed line was inaugurated, using, on this occasion, part of the route of the secondary line that previously linked Segovia to Valladolid.