Mt Barker / Porongurups We travel the Mount Barker Porongurup Road, skirting along the edge of the Porongurup Ranges. Visit up to 6 of these cellar doors in the Mt Barker / Porongurup region: Castle Rock Estate Duke's Vineyard Gilbert Wines IRONWOOD Estate Wines Plantagenet Wines Poacher's Ridge West Cape Howe Wines Galafrey Wines