Mieczysław Orłowicz Main Sudetes Trail (Polish: Główny Szlak Sudecki im. Mieczysława Orłowicza, GSS) is a public hiking trail in Poland running along the Sudetes. The total length of this route is 443 km and the approximate time to cover it is about 120 hours. The trail was constructed in 1947 and throughout its history has been several times modified. It is blazed red.