Cow Dub is a small canyon waterfall on Ease Gill, tucked behind a gorge wall on the rocky riverbank in the Lancashire/Yorkshire Dales borderlands.

Hidden from view until you round a corner, it has a striking, out-of-place quality after the open moorland approach, dropping into a pool within a compact rocky canyon.

The waterfall sits at roughly the point where Ease Gill begins to lose its water through the limestone bed, leaving an eerily dry valley downstream.

Flow can be surprisingly slender even after heavy rainfall, though the spot remains a rewarding and little-visited destination. The Lancashire Way long-distance route passes nearby.