Stonewain Valley was a long narrow straight valley in the eastern White Mountains, deep within the Drúadan Forest. Its eastern end opened just to the north-west of the Rammas Echor that encircled Minas Tirith.
A road called the Gondrant, four horses wide, had been made in ancient days by the Men of Gondor, as a route from the quarries beneath Min-Rimmon to Minas Anor.
By the time of the War of the Ring, it was overgrown and all but forgotten. However, on 13 March T.A. 3019, King Théoden met with Ghân-buri-Ghân in the Drúadan Forest and the headman of the Woses revealed the existence of the old road. During the next day the Rohirrim used the road in Stonewain Valley to avoid the Orcs blocking the main road to come to the Battle of the Pelennor Fields.