Boynuyogun, which is the main water source of Gelevera Deresi which is the other name of Özlüce Creek, is born from Akılbaba Mountain within the borders of Alucra District of Giresun and it is poured into the sea after 80 kilometers. These 3 streams, originating from the Akılbaba Mountain, converge around Arpacık Village of Espiye District of Giresun and form Gelevera Stream. Dere takes its name from Gelevera, the plateau where the Boynuyogun arm was born. The length of the Gelevera stream is 80 kilometers.