Alkie Creek marks a notable transition in the nature of the Tatshenshini. Up until this point, the Tat has been almost entirely channelized. As Alkie Creek and the glacial tributaries below start bringing in more and more sediment, the Tat changes into a glacially braided river. Numerous channels of varying depth merge and diverge forming a maze-like dynamic that will feel very unfamiliar to most boaters. Large tributaries also increase the speed of the river, bringing the first whitewater features since the first day canyon. Everything remains Class III or less, but the speed combined with the new glacial braids creates a new and challenging boating environment.