Ume River
There are several other major rivers in the reserve. The Tjulån River originates at the Tjulträsk lakes and joins the Vindel River in Ammarnäs. The Juktån River passes the great lake Överst Juktan and continues outside the reserve to Ume River for a total length of 170 km. Finally the Tärnaån River originates at Lake Tärnasjön before joining into the Ume River just outside the reserve. The Ume River itself is located outside the reserve, between the Artfjället mountain ranges and the rest of the reserve and unlike the rivers within the reserve, its waters have been regulated and used for hydroelectric power.