Riddoch Highway

The Riddoch Highway in south-eastern South Australia 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.[1]

Riddoch Highway

South Australia
Riddoch Highway near Padthaway
General information
TypeHighway
Length239 km (149 mi)
Route number(s)
  • A66
  • (Keith - Mount Gambier)
  • B66
  • (Mount Gambier - Port MacDonnell)
Major junctions
North end Dukes Highway, Keith, South Australia
 
South endCape Northumberland, Port MacDonnell, South Australia
Location(s)
Major settlementsPadthaway, Naracoorte, Coonawarra, Penola, Tarpeena, Mount Gambier
Highway system
The Riddoch Highway connects Keith, Naracoorte, Mount Gambier and Port MacDonnell in southeastern South Australia.

The highway has been designated as State Route A66 between Keith and Mount Gambier. The remainder, between Mount Gambier and Port MacDonnell has been labelled State Route B66, although this is not officially known as the Riddoch Highway.

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.[2]

The Royal Automobile Association of South Australia has rated the highway at 5/10.[3]

The Riddoch Highway is named after John Riddoch, the first white settler landholder and vigneron in Coonawarra.

Major intersections
LGALocationkm[4]miDestinationsNotes
TatiaraKeith0.00.0 Dukes Highway (National A8) – Adelaide, Melbourne
Naracoorte LucindaleThe Gap, Cadgee, Lochaber, Keppoch83.551.9 Bordertown-Naracoorte Road
Naracoorte10968 Wimmera Highway (C240) –Hynam, Edenhope
Wattle RangeGlenroy14188 Edenhope-Penola Road (C212) – Edenhope, Victoria
Wattle RangePenola15999 Casterton Road (C198) – Casterton, Victoria, Melbourne
Mount GambierMount Gambier210130/ Princes Highway – Portland, Victoria, Millicent, Kingston SE
GrantPort MacDonnell238148Cape Northumberland
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

Australian Roads portal

References
  1. "Naming of State Rural Roads South East (RACK PLAN 994)" (PDF). Department of Planning, Transport and Infrastructure. Retrieved 18 November 2014.
  2. 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 2014CS1 maint: multiple names: authors list (link)
  3. "roadwatch report – riddoch highway" (PDF). RAA. September 2006. Retrieved 16 October 2007.
  4. Google (6 February 2018). "Riddoch Highway" (Map). Google Maps. Google. Retrieved 6 February 2018.


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