thumb|upright=1.2|A dry gulch in the desert near [[Tamchy, Kyrgyzstan. The creek that may have run along the bottom of the gulch in the past has been diverted to a parallel aryk.]]
A gulch is a deep V-shaped valley formed by erosion. It may contain a small stream or dry creek bed and is usually larger in size than a gully. Sudden intense rainfall upstream may produce flash floods in the bed of the gulch.
thumb|Witches Gulch found in the [[Dells of the Wisconsin River]]
In eastern Canada, gulch refers to:
- a narrow deep cove (Newfoundland)
- a narrow saltwater channel (Nova Scotia)
See also
- , includes gorge.