The Orongorongo River runs southwest through the Orongorongo Valley in the southern Rimutaka Ranges of the North Island of New Zealand. The river and its associated catchments lie within the bounds of the Rimutaka forest park, which is administered by the Department of Conservation (New Zealand)[1]
For much of its course the river is a braided river, with a wide bed of gravel and a number of streams of water. The gravel bed can be seen as light-coloured areas of varying width in the image to the right.