Highway 18
Route information
Length160.8 km[1] (99.9 mi)
Major junctions
West end Hwy 43 in Green Court
East end Hwy 63 / Hwy 656 near Thorhild
and rural
Lac Ste. Anne County, Barrhead No. 11 County, Westlock County, Thorhild County
TownsBarrhead, Westlock
Highway system
Provincial highways in Alberta
Hwy 17 Hwy 19

Alberta Provincial Highway No. 18, commonly referred to as Highway 18, is a 161-kilometre (100 mi) highway in Alberta, Canada. It stretches from Highway 43 at the hamlet of Green Court, through the towns of Barrhead and Westlock, to Highway 63 east of the hamlet of Thorhild.[2]

Route description

Highway 18 begins northwest of the town of Mayerthorpe at the junction of Highway 43 at the hamlet of Green Court. It proceeds east for 8 km (5 mi), crossing the terminus of Highway 22 prior to reaching Highway 757. It turns north for a few kilometres and bends east again until it crosses Highway 764, then curves north again.[1]

The jog in the road skirts Thunder Lake Provincial Park to the north. Upon reaching Highway 763, Highway 18 turns east to the Town of Barrhead where it meets Highway 33. The two highways run concurrently to the north for approximately 5 km (3 mi) until a T–intersection north of town. Highway 18 then turns east from this intersection while Highway 33 turns west. Highway 769 branches to the north towards Neerlandia, 2 km (1 mi) east of this intersection.[1]

Highway 18 then crosses Highways 776 and 777 before it reaches Westlock at Highway 44, some 103 km (64 mi) from the starting point. It continues east, crossing Highway 2 at Clyde at an intersection known as "Clyde Corner". The highway goes through Thorhild as it crosses Highway 827 and proceeds west until it reaches Highways 63 and 656 where it ends.[1]


Highway 18 originally was a connection between Highway 2 at Clyde Corner and the towns of Westlock and Barrhead.[3] In the 1940s it was extended northwest from Barrhead to Fort Assiniboine,[4] and then in 1960 to Swan Hills.[5] In c. 1977, the 97 km (60 mi) section of Highway 18 between Barrhead and Swan Hills was renumbered to Highway 33, while Secondary Highway 655 between Barrhead and Thunder Lake Provincial Park, as well as Secondary Highway 656 between Clyde and Highway 46 (present-day Highway 63) west of Thorhild became part of Highway 18.[6][7] Around the same time, gravel roads between Thunder Lake and Green Court were designated as Secondary Highway 918,[7] and was upgraded and paved throughout the 1980s, becoming part of Highway 18 in c. 1987.[8]

Major intersections

From west to east:[9]

Rural/specialized municipalityLocationkm[1]miDestinationsNotes
Lac Ste. Anne CountyGreen Court0.00.0 Hwy 43 – Whitecourt, Grande Prairie, Edmonton
6.64.1 Hwy 22 south – Mayerthorpe
22.714.1 Hwy 757 south – Sangudo
Barrhead County43.727.2 Hwy 764 south – CherhillHwy 18 turns north
Campsie47.729.6 Hwy 763 north / PAR 107 west – Fort Assiniboine, Thunder Lake Provincial ParkHwy 18 branches east
Barrhead65.640.8 Hwy 33 south (49 Street) / 53 Avenue – Gunn, EdmontonHwy 18 branches north; west end of Hwy 33 concurrency
68.942.8 Hwy 33 north – Swan HillsHwy 18 branches east; east end of Hwy 33 concurrency
70.543.8 Hwy 769 north – Neerlandia, Vega
Westlock County85.953.4 Hwy 776 north
89.955.9Crosses the Pembina River
91.456.8 Hwy 777 south – Highridge
Westlock106.366.1 Hwy 44 (104 Avenue) – Slave Lake, High Prairie, Edmonton
117.773.1 Hwy 2 south – EdmontonWest end of Hwy 2 concurrency
Clyde119.474.2 Hwy 2 north – AthabascaHwy 18 branches east; east end of Hwy 2 concurrency
Thorhild CountyThorhild154.395.9 Hwy 827 (2nd Street)
160.899.9 Hwy 63 – Lac La Biche, Fort McMurray, Edmonton
Hwy 656 east to Hwy 831
Continues east as Hwy 656
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b c d e Google (2017-11-24). "Highway 18 in Alberta" (Map). Google Maps. Google. Retrieved 2017-11-24.
  2. ^ "2015 Provincial Highway 1-216 Progress Chart" (PDF). Alberta Transportation. March 2015. Archived (PDF) from the original on 2016-04-10. Retrieved 2016-10-12.
  3. ^ Department of Public Works (1939). Official Road Map (PDF) (Map). Province of Alberta. §§ D-5, E-5.
  4. ^ The H.M. Gousha Company (1951). Shell Map of Montana (Map). The Shell Oil Company. Southern Alberta inset. §§ C-4, D-4, D-5.
  5. ^ Pipeline to the Past : the history of Swan Hills and district. Swan Hills, AB: Swan Hills Historical Society. 1994. pp. 11–12. ISBN 1-55056-153-7.
  6. ^ Travel Alberta (1976–1977). Alberta Official Road Map (Map). Province of Alberta. §§ H-4, H-5, I-4, I-5, I-6.
  7. ^ a b Travel Alberta (1978–1979). Alberta Official Road Map (Map). Province of Alberta. §§ H-4, H-5, I-4, I-5, I-6.
  8. ^ Travel Alberta (1988). Alberta Official Road Map (Map). The Province of Alberta. §§ I-4, I-5.
  9. ^ Alberta Road Atlas (2005 ed.). Oshawa, ON: MapArt Publishing Corp. pp. 55, 56, 57.