Unknown Col

From the lake below the Omatane Glacier, climb a narrow scree gut followed by steep, rotten rock to the col. The descent into Unknown Stream involves following the Stewart Glacier and then downclimbing a tricky, steep waterfall on the true right. This waterfall has turned many parties back and a rope may be required for two short abseils. There are two further waterfalls, which present lesser difficulties, and the next 2 km of stream are straightforward but prone to rock fall. The final 5 km to Unknown Hut present no problems. Descent from Unknown Col is a straightforward walk when snow and avalanche debris cover the waterfalls and upper reaches of Unknown Stream.