The Great West Road was originally part of the Royal Road linking Gondor to the North-kingdom of Arnor. It ran between Minas Tirith and the Fords of Isen in the Gap of Rohan, where it joined the North-South Road to Arnor. The Great West Road was approximately 425 miles long. In Rohan, the Great West Road passed through the Fenmarch and the regions of the Eastfold and the Folde. The Road traversed the Snowbourn by way of a ford near Edoras, and a track branched off to the city. Further on, the Deeping-road branched off into the Deeping Coomb where Helm's Deep was located.