Łupków Pass or Lupkov Pass is a significant mountain pass in the Carpathian Mountains on the border between Poland and Slovakia, and close to the western border of Ukraine. Its highest point rises 640 m above sea level. It is located just south of the village Łupków in Poland and east of Medzilaborce in Slovakia. Underneath the pass runs a railway tunn…Łupków Pass or Lupkov Pass is a significant mountain pass in the Carpathian Mountains on the border between Poland and Slovakia, and close to the western border of Ukraine. Its highest point rises 640 m above sea level. It is located just south of the village Łupków in Poland and east of Medzilaborce in Slovakia. Underneath the pass runs a railway tunnel 642 m long, straddling the border between Poland and Slovakia.