Saskatchewan Highway 18

Highway 18
Highway 18 at dawn in winter
Route information
Maintained by Ministry of Highways and Infrastructure
Length	711.9 km[1] (442.4 mi)
Major junctions
West end	Highway 13 near Robsart
Major intersections	Highway 37 at Climax Highway 4 at Val Marie Highway 19 near Mankota Highway 2 at Killdeer and Rockglen Highway 36 near Coronach Highway 6 at Minton Highway 35 at Oungre Highway 47 at Estevan Highway 9 near Alameda Highway 8 at Carievale
East end	PTH 3 at Manitoba border near Gainsborough
Location
Country	Canada
Province	Saskatchewan
Rural municipalities	Reno, Frontier, Lone Tree, Val Marie, Glen McPherson, Mankota, Waverley, Old Post, Poplar Valley, Hart Butte, Happy Valley, Surprise Valley, Lake Alma, Cambria, Estevan, Coalfields, Enniskillen, Mount Pleasant, Argyle
Major cities	Estevan
Highway system
Provincial highways in Saskatchewan
← Highway 17 → Highway 19

Highway 18 is a provincial highway in the Canadian province of Saskatchewan. It runs from Highway 13 near Robsart, approximately 65 kilometres (40 mi) east of the Alberta border, to the Manitoba border near Gainsborough, where it becomes Highway 3. It passes through three major communities, all in the eastern quarter of Saskatchewan – Estevan, Oxbow, and Carnduff; it also passes north of the west and east blocks of Grasslands National Park. Highway 18 is about 712 kilometres (442 mi) long, which is the longest east-west highway and second longest highway in Saskatchewan.