High Quality Content by WIKIPEDIA articles! The Tokomairiro River is located in Otago, New Zealand. It flows southeast for some 50 kilometres (30 mi), reaching the Pacific Ocean at Toko Mouth 50 kilometres (30 mi) south of Dunedin. The town of Milton is located on the Tokomairiro`s floodplain, close to the junction of its two main branches (which run past the north and south ends of the town).