The brook rises in the hills just east of West Wickham in Cambridgeshire, only half a mile to the south of the source of the River Stour. It flows east for around  before crossing into Suffolk and turning south east.
The brook originates in the hills just east of West Wickham in Cambridgeshire, situated approximately half a mile to the south of the River Stour's source. It flows eastward before transitioning into Suffolk and turning southeast.