PTH 21 is two lanes and runs north–south in the southwestern region of the province. It is the main highway for the towns of Deloraine (where it meets PTH 3), Hartney, Hamiota, and Shoal Lake.
The speed limit is 90km/h (55mph).
In 2012, PTH 21 was given the dubious distinction of being named the second-worst road in the province that year.[1]
PTH 21 winds its way along Shoal Lake for a few kilometres to enter the town of Shoal Lake, traveling through neighbourhoods before making a sharp right in downtown at an intersection with The Drive, which leads to PTH 42. The highway curves back northward as it crosses a railway line, passing through more neighbourhoods before having a junction with PTH 16 (Yellowhead Highway). PTH 21 leaves Shoal Lake and heads north for several kilometres to enter Oakburn. It passes through neighbourhoods, as well as the eastern edge of downtown at the intersection with Main Street, before crossing a former railway line and coming to an intersection with PTH 45 (Russell Subdivision Trail), where PTH 21 ends and the road continues north as PR 577 towards Olha.[2][3]
The entire length of Manitoba Highway 21 is a rural, paved, two-lane highway.
History
The northern terminus for PTH 21 was originally located at PTH 2 in Deleau. In 1947, it extended north to PTH 1 in Griswold. In 1949, it extended north to PTH 4 in Shoal Lake, replacing part of PTH 1 and all of PTH 28. In 1960, PTH 21 extended north to its present terminus.[4]
Provincial Road 455 (PR 455) is a 11.6-kilometre-long (7.2mi) east–west spur of PTH 21 in the Rural Municipality of Whitehead, providing access to the town of Alexander.
Provincial Road 463 (PR 463) is a short 3.8-kilometre-long (2.4mi) east–west spur of PTH 21 in the eastern portion of the Rural Municipality of Wallace-Woodworth, providing access to, via PR 254 and PR 259, the town of Virden. It is entirely a two-lane gravel road, with no settlements or other major intersections along its length.[3][5]
Provincial Road 469 (PR 469) is a 13.1-kilometre-long (8.1mi) east–west spur of PTH 21, running from the town of Hamiota to PR 264 between Crandall and Decker, within both the Prairie View Municipality and the Hamiota Municipality. It is entirely a two-lane road, with the segment in the town of Hamiota, also known as Birch Avenue, being paved, while the rest is gravel.[3][6]
Prior to 1992, PR 469 continued east through town along Birch Avenue past PTH 21 to come to an end 13.5 kilometres (8.4mi) later at an intersection with PR 354 along the banks of the Oak River.[7][8]
Provincial Road 541 (PR 541) is a 6.5-kilometre-long (4.0mi) east–west spur of PTH 21 in the Municipality of Grassland, providing access to the hamlet of Grande-Clairière. Starting from just north of the town of Hartney, it heads west along a former section of PR 347 to a junction with PR 254 just east of the hamlet. It is entirely a two-lane gravel road, with no other settlements or major intersections to speak of.[3][9]
PR 541 was designated along its current alignment and has not changed much since. Prior to 1992, this routing was part of a much longer PR 347, while the original PR 541 (1966-1990) ran between PTH 5 (Parks Route) just south of Neelin to PR 442 north of Mather.[7][8]
Provincial Road 543 (PR 543) is a 11.5-kilometre-long (7.1mi) east-west spur of PTH 21 in the Rural Municipality of Sifton, providing access to the hamlet of Oak Lake Beach. It is entirely a two-lane gravel road, with no other major intersections or settlements to speak of as it travels through a mix of rural farmland and wooded areas.[3][10]
Provincial Road 564 (PR 564) is a 14.7-kilometre-long (9.1mi) north–south spur of PTH 21 mostly within the Riverdale Municipality, connecting the Sioux Valley Dakota Nation with the hamlet of Bradwardine. It includes three separate crossings of the Oak River. The first 4.2 kilometres (2.6mi) of the highway between PTH 21 and the first crossing of the Oak River is a paved, two-lane highway while the rest is gravel.[3][11]
Between 1966-1990, the PR 564 designation was applied to several municipal roads in the Rural Municipality of Minto-Odanah, linking the town of Minnedosa (at PR 262) with Minnedosa Airport and the hamlet of Bethany, ending at PR 471. The route is now known as Westhope Road (Road 86N), Road 99W, Bethany Road (Road 89N), and Road 98W. PR 564 was designated along its current route in 1992 and has not changed much since.[7][8]
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ND 14 (Carbury–Goodlands Border Crossing)
PTH 45 / PR 577 at Oakburn 
