The source of Grajcarek are considered to be at the source of Biała Woda, which is found at a height of approximately 950 metres. The basin area of the river is 85,5 km², the length from the source to the mouth of the river is about 15 km, with an average fall of 3.5%. The river flows in the general direction of East to the West of the valley, which is also the border between the Pieniny and Beskid Sądecki.