thumb|330px|Salpausselkä ridge system
thumb|330px|Animation about the formation of Salpauselkä
Salpausselkä (; "Bar Ridge") is an extensive ridge system left by the ice age in Southern Finland. It is a large terminal moraine formation that formed in front of the Baltic ice lake during the Younger Dryas period about 12,250–10,400 years ago. All together the formation is close to from end to end, and the ridges can be as tall as in some places.