High Quality Content by WIKIPEDIA articles! The Mallee Highway (formerly the Ouyen Highway on the Victoria side) runs east from Tailem Bend in South Australia through cereal-growing farmland at the southern end of the Murray Mallee to Pinnaroo near the border with Victoria, where it crosses route (from Bordertown to Loxton). It continues in Victoria through Ouyen, where it crosses the Calder Highway (the old Ouyen Highway finished here and never proceeded east), and Piangil, where it crosses the Murray Valley Highway .