PR 238 begins at the junction of Provincial Trunk Highway 9 (PTH 9) and PTH 27 near the settlement of Parkdale.

It follows a scenic route along the west bank of the Red River north to Lockport, terminating at PTH 44 near the St. Andrews Lock and Dam.

River Road itself continues north as a municipal road and ends at PTH 9 near Lower Fort Garry.

[1][2] River Road, or Inner Road, was constructed in the early 1800s to connect settlements along the Red River, such as St. Andrews and St. Clements, to the King's Road (present-day PTH 9) between Upper and Lower Fort Garry.

[4] There are numerous points of interest along PR 238, including four National Historic Sites: Provincial and municipal historic sites along PR 238 include: River Road Provincial Park, created in 1997, is located at several sites along the road.