Carpathian Mountains Traverse
Also known as the Carpathian Arch, this is a 2000 km route that runs the length of the Carpathian Mountains, between Orszów (Romania) and Bratislava (Slovakia). The route & previous crossings are listed here: http://lukaszsupergan.com/kto-kiedy-jak-dlugo-statystyka-lista-przejsc-luku-karpat/