Szlak Karpacki known also as Szlak Graniczny (Border Trail) or Szlak Niebieski (Blue Trail) is third longest marked hiking trail in Poland measuring 430 km. It starts in city of Rzeszów and goes through most remote parts of polish Carpathian Mountains, visiting two National Parks and ending in Grybów. Partially it follow polish-slovakian border and in small distance polish-ukrainian border. It is getting more of attention lately being known as hard due to its remoteness, tough logistics and possible encounters with wild animals (bears, wolves, lynx).