The Riddoch Highway (route A66) in South Australia branches from the Dukes Highway at Keith and travels south through Naracoorte and Penola to Mount Gambier.

It passes through grazing and cereal-growing land, horticultural and vineyards (including Padthaway, Wrattonbully and Coonawarra wine regions), and plantation timber, predominantly pinus radiata.

The Riddoch Highway is named after John Riddoch , the original landholder and vigneron in Coonawarra.

External links

• South Australia Central
• South Australian Tourism Commission
• Transport SA