Going upriver, and what it tells us, about us

Colin Heinz has walked, tramped and climbed every one of the rivers which flow from the Main Divide out to the sea. In Upriver - From the Sea to the Southern Alps Colin Heinz creates a unique and detailed account not just of the landscape but of eight-hundred years of the South Island's history, captured during expeditions he started making as a school boy, five decades ago. Colin tells Kathryn Ryan it has been his life's work.