| Guide River | |
| Mouth Location: | Acheron River |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
The Guide River is a river in the Marlborough Region of New Zealand. It starts near Barefell Pass on the eastern side of the Rachel Range and flows south-east to join the Acheron River, which joins the Waiau Toa / Clarence River and eventually drains into the Pacific Ocean.[1]
The river was named by Sir Frederick Weld and his station manager in 1850,[2] because it guided them from the Barefell Pass to the Acheron River (which they misidentified as the Clarence River).[3]