Hungary's Országos Kéktúra (National Blue Trail): 1,177 km from Írott-kő on the Austrian border to Hollóháza in the northeast — Europe's oldest long-distance trail, crossing the Balaton uplands and the Mátra, Bükk and Zemplén hills in 27 sections.
Hungary's Országos Kéktúra (National Blue Trail): 1,177 km from Írott-kő on the Austrian border to Hollóháza in the northeast — Europe's oldest long-distance trail, crossing the Balaton uplands and the Mátra, Bükk and Zemplén hills in 27 sections.
