The Taniwha is a Mountain Bike and Trail Run / Walk event which takes place on the Waikato River Trails. The event offers a 44km marathon run as well as a 22km half marathon, 16km and 7km which can be run or walked. For mountain bike and E-bike riders distances available are 14km, 22km and 44km. 

The Taniwha event celebrates the hard work of the Waikato River Trails Trust in developing 100km of top quality trails, most of it on previously inaccessible land along the Waikato River. The trails wind their way through native bush, exotic forest, historic landmarks, geological formations, open reserves, boardwalks over wetlands, and stunning single track.