Goyder Highway (B64) is a west–east link through the Mid North region of South Australia connecting Spencer Gulf to the Riverland. It is part of the most direct road route from Port Augusta (and areas beyond including Eyre Peninsula, Western Australia and the Northern Territory) to much of Victoria and southern New South Wales.

Quick Facts Goyder Highway South Australia, Coordinates ...

Goyder Highway South Australia
Goyder Highway northwest of Morgan
West end East end
Coordinates	33.326255°S 138.184198°E / -33.326255; 138.184198 (West end) 34.235411°S 140.524380°E / -34.235411; 140.524380 (East end)
General information
Type	Highway
Length	266 km (165 mi)[1]
Route number(s)	B64 (1998–present)
Former route number	National Route 64 (1955–1998)
Major junctions
West end	Augusta Highway Crystal Brook, South Australia
	Main North Road RM Williams Way Barrier Highway Worlds End Highway Thiele Highway
East end	Sturt Highway Monash, South Australia
Location(s)
Region	Yorke and Mid North, Murray and Mallee[2]
Major settlements	Crystal Brook, Spalding, Burra, Morgan
Highway system
Highways in Australia National Highway • Freeways in Australia Highways in South Australia

Close

Goyder Highway is named after George Goyder, a government surveyor who first identified and mapped Goyder's Line which indicates the northern limit of climatic suitability for intensive agriculture in South Australia. Goyder's Line is near the highway from Crystal Brook to past Burra.

Goyder Highway starts from the Augusta Highway at Crystal Brook running east then southeast. It is briefly concurrent with Horrocks Highway near Gulnare, RM Williams Way near Spalding and Barrier Highway near Burra.^[3] The highway descends from the Mount Lofty Ranges onto the plains of the Murray–Darling basin. It passes the end of Thiele Highway at Morgan and continues upstream on the north side of the Murray River to meet Sturt Highway between Barmera and Monash.^[3]