 Flowing firstly under Forest Road (A503 road) and then the Gospel Oak to Barking line, it skirts the Walthamstow Reservoirs close to Walthamstow Marshes.It passes under Coppermill Lane before flowing under the Lea Valley Line as the channel approaches Lea Bridge Road, part of the A104 road.It crosses Hackney Marshes and passes through a culvert before joining the Old River Lea close to the New Spitalfields Market.