Emerald River

 was a river in the Barony of Bristol. It was a few miles to the east of the Falls River.

The Town of Vargrend was mostly on a small hill on the west side of the river. Bristol Manor was located on a larger hill on the east side, to the north of the town.

Just to the northwest of the manor, the river was dammed by the mill of Heimdal Miller, creating the Emerald Lake to the north.