The Ahaura and its many tributaries rise in the Lake Sumner State Forest park and enters the Grey River at the small settlement of Ahaura approximately 30 km upstream from Greymouth. It drains a huge area of land and in its lower reaches below the Haupiri confluence can have a tea-colour stain for much of the year. The reaches above the junction with the Haupiri tend to have very clear water however for much of the year.
- "Ahaura River fishing-Ahaura River trout fishing-nzfishing". www.nzfishing.com. Retrieved 2018-07-17.
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