Before revision: The western routes were the Walata Road , from the Sénégal River, and the Taghaza Trail, from the Niger River, which had their northern termini at the great trading center of Sijilmasa, situated in Morocco just north of the desert.
After revision: The western routes were the Walata Road past present-day Oualata, Mauritania, from the Sénégal River, and the Taghaza Trail, from the Niger River, past the salt mines of Taghaza, north to the great trading center of Sijilmasa, situated in Morocco just north of the desert.