A trail leading through the Bug River Valley, a land of unique protective values in 5 landscape parks, numerous nature reserves and protected landscape areas.
Route: Wyszków – Kamieńczyk – Treblinka – Jabłonna Lacka – Tonkiele – Wólka Zamkowa – Drohiczyn – Siemiatycze – Turna Mała – Serpelice – Janów Podlaski – Terespol – Kodeń – Jabłeczna – Włodawa – Sobibór – Dorohusk – Horodło.
Color - blue, length 420.8 km, including 32 km within the territory of the poviat.