It starts at traffic lights on the A107 in Hackney and heads east along Morning Lane, which is initially dual until the entrance to the Tesco car park is passed. The road cannons off the North London Line into Homerton where the road splits, becoming two one-way roads.
The eastbound road bears right and remains two-way until the next junction where it becomes one-way. It follows Kenton Road to end at traffic lights on the A106, which is itself one-way eastbound here. The westbound section starts at traffic lights further east where the A106 meets the A102. It heads west along Wick Road to return to the traffic lights in Morning Lane, where through traffic on the B113 turns right.
In 1922, the B113 continued east of what is now the A102 along Whitepost Lane and Carpenters Road to end on the A11 in Stratford. This section was later upgraded to the A115 and has now been declassified and partly demolished to build the Olympic Park.