Hossa’s rivers are categorised as Class I and Class II white waters. Class I white waters are easy even for beginners and do not require special rafting equipment. In the slightly difficult white waters of Class II, the trail disappears from sight every once in a while. Inexperienced rafters must familiarise themselves with the trail beforehand from the shore. Locations suitable as starting points for rafting routes include the boat lowering places by the parking area of Julma Ölkky and at Iso-Perankajärvi.