Riddoch Highway

Riddoch Highway is a rural highway in south-eastern South Australia, designated as route A66 between Keith and Mount Gambier, with the remainder between Mount Gambier and Port MacDonnell designated as route B66. It is named after John Riddoch, the first white settler landholder and vigneron in Coonawarra.

Riddoch Highway

South Australia
The Riddoch Highway near Padthaway
Riddoch Highway is located in South Australia
North end
North end
South end
South end
Coordinates
General information
TypeHighway
Length239 km (149 mi)[1]
Route number(s)
  • A66 (1998–present)
    (Keith–Mount Gambier)
  • B66 (1998–present)
    (Mount Gambier–Port MacDonnell)
Major junctions
North end Dukes Highway
Keith, South Australia
 
South endSea Parade
Port MacDonnell, South Australia
Location(s)
RegionLimestone Coast[2]
Major settlementsPadthaway, Naracoorte, Coonawarra, Penola, Tarpeena, Mount Gambier
Highway system

Route

The Riddoch Highway branches from the Dukes Highway at Keith and travels south through Padthaway, Naracoorte, Penola, Nangwarry, Tarpeena, and Mount Gambier to Port MacDonnell and nearby Cape Northumberland.[3] It passes through grazing and cereal-growing land, horticultural and vineyards (within the following wine regions - Padthaway, Wrattonbully, Coonawarra and Mount Gambier), and plantation timber, predominantly pinus radiata.[4]

Safety

The Royal Automobile Association of South Australia has rated the highway at 5/10.[5]

Major intersections
LGA[6]Location[1][3]km[1]miDestinationsNotes
TatiaraKeith0.00.0 Dukes Highway (A8) – Adelaide, Tailem Bend, Bordertown, MelbourneNorthern terminus of highway and route A66
Naracoorte LucindaleThe Gap83.551.9 Bordertown-Naracoorte Road (B57) – Bordertown
Naracoorte10968 Wimmera Highway (C240) – Hynam, Edenhope, Horsham, MarongContinues into VIC as route B240 along Wimmera Highway eventually to Marong
Wattle RangeGlenroy14188 Edenhope Road (C212) – EdenhopeContinues into VIC as route C212 along Edenhope-Penola Road eventually to Edenhope
Penola15999 Casterton Road (C198) – CastertonContinues into VIC as route C198 along Casterton-Penola Road eventually to Casterton
Mount GambierMount Gambier210130 Princes Highway (A1 east, B1 west) – Millicent, Kingston SE, PortlandRoute transition: A66 north, B66 south
GrantPort MacDonnell238148Sea Parade - Cape NorthumberlandSouthern terminus of highway and route B66
  •       Route transition

See also

icon Australian Roads portal

References
  1. Google (6 June 2022). "Riddoch Highway" (Map). Google Maps. Google. Retrieved 6 June 2022.
  2. "Location SA Map viewer with regional layers". Government of South Australia. Retrieved 16 June 2022.
  3. "Location SA Map viewer with suburb layers". Government of South Australia. Retrieved 16 June 2022.
  4. Longbottom, Mardi; Maschmedt, David and Pichler, Markus (2011), Unearthing viticulture in the Limestone Coast (PDF), p. 12, ISBN 978-0-646-56744-0, archived from the original (PDF) on 6 November 2014, retrieved 5 November 2014{{citation}}: CS1 maint: multiple names: authors list (link)
  5. "roadwatch report – riddoch highway" (PDF). RAA. September 2006. Retrieved 16 October 2007.
  6. "Location SA Map viewer with LGA layers". Government of South Australia. Retrieved 16 June 2022.
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