The Clarence River in the Clarence Valley of New South Wales is a significant coastal estuary system and is the focal point for Australia's longest whitewater trail, which spans 195 kilometers along the Clarence, Mann, and Nymboida rivers. This extensive trail offers a wide range of conditions, from calm, gentle sections with long pools and gravel races to some of the country's most challenging Grade Five rapids, particularly in its upper reaches. The paddling route officially begins at the junction of the Nymboida and Little Nymboida rivers and concludes at Copmanhurst on the Clarence River. The river flows through a landscape of lush countryside and world heritage-listed rainforest reserves, eventually meeting the sea between the coastal towns of Iluka and Yamba. Key towns along its banks include Grafton, Maclean, Ulmarra, Iluka, and Yamba, with Clarence River Ferries providing a crossing between Iluka and Yamba at the estuary mouth. A detailed map kit for the canoe and kayak trail outlines access points, recommended skill levels for specific sections, safety information regarding rapids, and accommodation options along the route. The overall character of the experience varies dramatically from adventurous whitewater in the hinterland to broader, more tranquil estuarine conditions nearer the coast. The region hosts paddling events such as the Clarence 100, a multi-day marathon paddle. The river is also used by other vessels, including houseboats and sailing clubs, indicating shared waterway use. The Clarence Valley is recognized for its rich cultural history, encompassing the traditions of the Bundjalung, Gumbaynggirr, and Yaegl traditional owners.