The Oreti River flows through Southland on New Zealand's South Island, passing through the towns of Lumsden, Dipton, and Winton in its middle reaches before continuing south. The river has been used as a paddling stage in the GODZONE Adventure Race, with the put-in historically placed at Dipton Flat and the take-out near the outskirts of Winton — a section that, at adequate water levels, represents roughly 2.5 hours of paddling.

Water levels on the Oreti can vary considerably, and low flows are a genuine planning concern. During the 2023 GODZONE race, extremely low water conditions forced organizers to shorten the kayak section by approximately 23 kilometres, moving the put-in downstream from Dipton Flat to near Winton. Paddlers should monitor the flow monitoring station at Three Kings, which provides gauge data relevant to conditions in this part of the river. The Oreti at Three Kings gauge is also used as a reference indicator for nearby tributaries and packrafting runs in the Eyre Mountains area.

The upper reaches of the river are noted for their clear water and picturesque character, making them a popular destination, though access in those sections is primarily associated with fishing under a voluntary beat system. The middle reaches near Lumsden, Dipton, and Winton are more accessible and less frequented.

The river also hosts competitive jet boat racing, including a 63-kilometre marathon event, so paddlers should be aware that motorized craft operate on the river and may be encountered depending on timing and location.