The current PTH 27 has been in existence since 1968. The highway was originally numbered as
PTH 8A when it first opened in 1964. Prior to this, Highway 27, while still a short trunk highway, was located in the southwestern part of the province. It was an unpaved highway which provided access to
Rapid City between
PTH 10 at Tremaine (this section was known as
Highway 26 prior to 1938) and
PTH 16 (then known as
Highway 4) at Basswood. The highway followed what is now
PTH 24 and
PR 270. The original length of Highway 27 was 29 km (18 mi). Highway 27 was shortened to in 1956 when the section between Tremaine and Rapid City was renumbered to its current PTH 24 designation. The original Highway 27 was decommissioned in its entirety in 1965 and redesignated as PR 270 when the Manitoba Government implemented its secondary road system the following year. == Major intersections ==