Pyhäjärvi is a medium-sized lake of Central Finland, located on the border between the municipalities of Saarijärvi and Äänekoski. It belongs to the Kymijoki main catchment area. Pyhäjärvi (meaning: Holy lake) is a common name for lakes in Finland. There are 39 lakes with the same name.Järviwiki, all Pyhäjärvi-lakes. Retrieved 2014-02-28. .

Pyhäjärvi has two outflows: most of its waters flow into Kiimasjärvi through a hydroelectric plant on the Parantalankoski rapids. The lake's second and original outflow is the river Pyhäjoki, which discharges into Iso-Lumperoinen. Ultimately, all of the lake's waters flow into Kiimasjärvi, as Iso-Lumperoinen discharges into Pieni-Lumperoinen, then to Saarijärvi, Summanen and finally Kiimasjärvi.

See also List of lakes in Finland

References