Alberta Highway 4

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Alberta Highway 4 shield Redcoat Highway Coat Trail

Highway 4
Route information
Length: 103 km (64 mi)
Major junctions
South end: I‑15 at Coutts
  Hwy 36 at Warner
Hwy 52 near Stirling
Hwy 61 near Stirling
North end: Hwy 3 in Lethbridge
and rural
Warner No. 5 County, Lethbridge County
Major cities: Lethbridge
Towns: Milk River,
Villages: Coutts, Warner
Highway system

Provincial highways in Alberta

Hwy 3A Hwy 5

Alberta Provincial Highway No. 4[1] is a north-south highway in southern Alberta, Canada. It is designated a core route in Canada's National Highway System, connecting Lethbridge to the United States,[2] and comprises the southernmost leg of the CANAMEX Corridor. Highway 4 spans approximately 103 km (64 mi) from Alberta's border with Montana to the Crowsnest Highway (Highway 3).[3][4] It is preceded by Interstate 15, which connects Alberta with American cities such as Salt Lake City, Las Vegas, Los Angeles, and San Diego.

Between Lethbridge and Stirling, Highway 4 is designated part of the Red Coat Trail, which continues as Highway 61 east towards the Saskatchewan border and continues as Highway 3 west to Highway 2 near Fort Macleod.

Route description[edit]

Interstate 15 becomes Highway 4 as it crosses the international border between Montana and Alberta. The route is a four-lane divided highway for its entire length from the Village of Coutts, which is located at the border, to Highway 3 in the City of Lethbridge. Outside urban areas, the speed limit of Highway 4 is 110 km/h (70 mph).

Generally travelling in a northwest direction from Coutts, the highway bypasses the Town of Milk River and the Village of Warner, passes by the Hamlet of New Dayton, and provides access to the Village of Stirling via Highway 846. The highway enters Lethbridge as 24 Avenue S, and then turns north onto 43 Street S to Highway 3.


Within Lethbridge, Highway 4 once continued along 24 Avenue S, beyond 43 Street S, to Highway 5 (Mayor Magrath Drive), and then continued in a northwest direction along Scenic Drive S to Highway 3.

In September 1999, Highway 4 and Interstate 15 in Montana — being the main highway between the cities of Helena and Lethbridge — was designated the First Special Service Force Memorial Highway. It was named after this force as this was the route travelled in 1942 by its Canadian volunteers to join its American counterparts for training at Fort William Henry Harrison.

Major intersections[edit]

The following is a list of major intersections along Alberta Highway 4 from south to north.[3][4]

Municipality km Description Notes
Village of Coutts 0 Begins at Montana border
Preceded by I‑15
1 Hwy 500 branches off to the east  
County of Warner No. 5 16 Hwy 501 branches off to the west
Hwy 501 concurrency begins
Town of Milk River 19 Hwy 501 branches off to the east
Hwy 501 concurrency ends
County of Warner No. 5 38 Hwy 36 branches off to the north  
46 Hwy 506 branches off to the west  
66 Hwy 52 branches off to the west  
74 Hwy 61 branches off to the east
Hwy 846 branches off to the south to Stirling
RedCoatTrail.png Red Coat Trail concurrency begins
Lethbridge County 86 Crosses Hwy 845  
89 Hwy 508 branches off to the west  
City of Lethbridge 100 Former alignment of Hwy 4 (24 Avenue S) branches off to the west  
102.5 Hwy 512 (1 Avenue S) branches off to the east  
103 Ends at Hwy 3 (Crowsnest Trail)
Succeeded by Hwy 843 (43 Street N)
RedCoatTrail.png Red Coat Trail concurrency ends
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ Provincial Highways Designation Order, Alberta Transportation, p. 2 
  2. ^ "National Highway System". Transport Canada. 2009-12-13. Retrieved 2011-03-17. 
  3. ^ a b "2010 Provincial Highways 1 - 216 Series Progress Chart" (PDF). Alberta Transportation. March 2010. Retrieved 2011-03-17. 
  4. ^ a b Alberta Official Road Map (Map) (2010 ed.). Alberta Tourism, Parks and Recreation. § N–6, N-7, O–7. 

External links[edit]