The Mōkau River sits in the King Country region of New Zealand's North Island, within the broader Taranaki and Waitomo area. It is rated Grade 3-4 and is regarded as one of the more consistently runnable rivers in the region, including during the lower flows of summer when many other rivers become too shallow to paddle. The water is notably warm, making it a practical option for winter paddling as well.

The run can be completed in around two hours without stopping to scout, though paddlers should be aware of specific technical hazards. The rapid known as Little Aratiatia features water sieving to the left of a narrow section, which presents a serious risk for swimmers. At the final drop, the correct line is to the left in order to avoid an undercut on the right bank. The river also features a rapid called Little Huka. At levels above 1.5 on the gauge, back loops are possible, though they rarely hold. The run is considered best at 1.8 on the gauge or higher. Portaging the main rapids is an option for those who prefer it.

The Mangataoki River, a nearby tributary run, uses the Mōkau as its take-out point, so paddlers on that route will finish on the Mōkau. A power station operates on or near the river, and a flow phone number (07 877-8525) is available for gauge information — paddlers are asked not to abuse this contact. Given the power station influence, flow conditions may be affected by operational decisions upstream.