The Darling River joins the Murray at Mildura, and this, combined with a system of locks and weirs, keeps the river’s water level higher here. Locks are gravity-operated gates that help watercrafts travel along the river by varying the water level as you head upstream or downstream. (Fishways or narrow chutes on the side of the locks allow fish to navigate their way around the river.) Kayakers can undertake a 260-kilometre trip between Wentworth and Renmark that will take between six and ten days. Lock 10 is the starting point; a lock operator will let you through and you’ll pass through five more locks on the way to Renmark. The river is wide in places and there are red cliffs and shady campsites by the river where you can stop for the night.