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.The highway has been designated as State Route A66 between Keith and Mount Gambier.
| Attributes | Values |
|---|---|
| rdfs:comment |
|
| foaf:name |
|
| foaf:depiction | |
| city | |
| country | |
| is part of (literal) |
|
| length (μ) |
|
| route junction | |
| thumbnail | |
| is route junction of |