The event featured two days in northern Wales and one day in the middle of the country. The first leg was long and started with a spectator stage at Tir Prince Raceway on the evening of 4 October. It then moved into the forests of Conwy and Gwynedd on 5 October and was made up of two passes over Clocaenog Forest, Penmachno Forest and a new stage formed by merging the Brenig reservoir stage—which was run as the Power Stage between 2014 and 2017—with the Alwen stage using parts of the B4501 to connect them. Now known as Brenig, it was the longest stage of the rally at . Penmachno Forest was run in its full length by using public roads. The Cholmondeley Castle spectator stage in England was removed and replaced by a new spectator stage called Slate Mountain. The rally moved to Powys and Ceredigion on 6 October for the longest day of the rally, totalling competitive kilometres. It consisted of two passes over the Myherin, Hafren, Dyfi and Gartheiniog stages and a single running of Dyfnant. The Hafren stage was extended to include the Sweet Lamb spectator arena. The 2018 event marked the first time since 1997 that these five stages were run on the same day. The rally returned to northern Wales on 7 October and the forests of Conwy and Snowdonia. The third leg was the shortest of the rally at long and featured Elsi, a brand new stage, and two passes of Gwydir. The Gwydir stage was doubled in length from previous years before the rally concludes with two passes over a spectator stage around the Great Orme headland and the streets of Llandudno. A shortened version of the Great Orme stage had previously been used in 2011 when it was run in the opposite direction.