Riihimäki is a town and municipality in the south of Finland, about 69 kilometres (43 mi) north of Helsinki and 109 kilometres southeast of Tampere. An important railway junction is located in Riihimäki, since railway tracks from Riihimäki lead to Helsinki, Tampere and Lahti. Several businesses also operate in Riihimäki. Notably, Würth Oy has its Finnish headquarters and logistics center in Riihimäki. Valio has a major dairy in the Herajoki part of Riihimäki. The famous Sako rifles are also produced in Riihimäki. Riihimäki also has the second-highest flagpole in Finland.

Lahti is a city in Finland and the regional capital of Päijät-Häme. It is located in the Finnish Lakeland. The population of Lahti is approximately 121,000, while the sub-region has a population of approximately 204,000. It is the 9th most populous municipality in Finland, and the sixth most populous urban area in the country.