The Shiribetsu River (尻別川, 126km) is a gorgeous waterway snaking its way northwest from the foot of Nakayama Pass, around the flanks of Yotei-zan, and along the Niseko Range to the Japan Sea via Niseko. This route on a mellow upper section of the river is suitable for intermediate-level paddlers or beginners with an experienced buddy, and will give full-frontal views of Yotei-zan on the way. Further downstream is some serious whitewater, but this section is perfect for smelling the roses and enjoying a relaxing day out.