Over its upper course (fed by the Hasbani River, Banias River, Dan River, and the Iyyon Stream), the river drops rapidly in a 75-kilometre (47 mi) run to the once large and swampy Lake Hula, which is slightly above sea level. Exiting the now much-diminished lake, it goes through an even steeper drop over the 25 kilometres (16 mi) down to the Sea of Galilee, which it enters at its northern end. The Jordan deposits much of the silt it is carrying within the lake, which it leaves again near its southern tip at Degania Dam.