From here, the highway heads north through a forested region with many lakes; the route lies entirely within the Northern Highland-American Legion State Forest.

After crossing a small creek, the highway turns west toward a junction with County Highway C. WIS 155 turns north at the junction and continues through a populated area south of Sayner.

The route curves northwest into Sayner, entering the Town of Plum Lake as it does so.

The routes run through a mixed residential and business district, passing the Vilas County Historical Museum and the Plum Lake Library.

WIS 155 ends in northern Sayner at another junction with CTH‑N, which continues to the west; Plum Lake lies to the north of the terminus.