Water parting n. (Phys. Geog.) A summit from the opposite sides of which rain waters flow to different streams; a line separating the drainage districts of two streams or coasts; a divide; a watershed.
... was such that, they got up without difficulty, and had more time to examine these extraordinary rocks, which were as perpendicular as a wall, and gave the traveller the idea of a succession of enormous Gothic cathedrals. With little difficulty they transported their canoe across the water parting to the Peace River. ... — Pioneers in Canada • Sir Harry Johnston