The river's source is a small wooded lake just north of the village of Swanton Novers, after which the river passes close to Fulmodeston, then north to pass through the village of Great Snoring, which is noted in the Domesday book as having a watermill.
The river originates from a small forested lake located near the village of Swanton Novers. It then travels close to Fulmodeston before flowing northward and passing through the village of Great Snoring, which is mentioned in the Domesday Book as having a mill.