The Hope River in Canterbury is one of three rivers by that name in the South Island of New Zealand. It is a tributary of the Waiau River. The Hope River rises at the Hope Pass in the Southern Alps, which is the main divide for the South Island. The river runs northeast through Lake Sumner Forest Park then south until it turns east along a large valley formed by the Hope Fault, a significant tectonic fault line. It is joined by a major tributary, the Boyle River which flows south from the Lewis Pass some 12 kilometres (7.5 mi) above its confluence with the Waiau.