The Knag Burn Gateway is a gateway which was built into Hadrian's Wall some time after construction of the wall itself, generally acknowledged to be during the fourth century.

The burn itself passes beneath the wall via a culvert a few metres to the West of the gateway.

Knag Burn Gateway is one of the few gates through the wall that isn't part of a milecastle or fort.

[1] The remains indicate that the structure consisted of a single-lane gateway, with guard-chambers on either side and a gate at each end, thus allowing two-stage controlled passage through the wall.

A. Richmond suggested that the gateway was constructed to allow trade traffic through the wall some time in or after the fourth century.