The Tairua River originates in the southern Coromandel Range on the Coromandel Peninsula and flows through the historic gold mining area of Broken Hills before continuing past Hikuai to Tairua Harbour. The river passes through a mix of native forest and farmland along its course, and the surrounding landscape includes old mining tracks from the area's gold mining history.

The most commonly described paddling route runs from the DOC campsite at Broken Hills downstream to Hikuai, rated Grade II. This is a one-day trip through scenic kauri forests and is not widely known, meaning it sees relatively light paddling traffic. The journey takes approximately two hours. The river is generally calm with shallow, gentle rapids, making it suitable for beginners. The primary practical challenge is avoiding getting stuck on the riverbed during dry periods when water levels drop, so paddlers should be mindful of conditions during dry spells.

To reach the put-in at Broken Hills, take State Highway 25A to Hikuai on the east side of the peninsula, then turn onto Puketui Valley Road. The road follows the river closely to the walking tracks and DOC campsite at Broken Hills. The take-out at Hikuai involves navigating under the State Highway 25 bridge and locating a small, steep sandy or grassy exit area on the right bank. Broken Hills is approximately 44 km and 44 minutes from Thames, 59 km and about an hour from Whitianga, and 146 km and roughly two hours from Auckland.

Along the route there are several swimming holes, some of which are unmarked and may require local knowledge to locate. Below Hikuai, the river continues toward Tairua Harbour, where a ferry service operates between Tairua and Pauanui. The lower river near Pauanui passes through mangroves, offering a different character to the upper forested section. A trail development project is underway along the river's banks, which may eventually improve access and amenities in the area.