The lower slopes are dominated by large red beech, with a healthy sub-canopy of other species, such as broadleaf andputaputawētā. Higher up, silver beech and finally the hardy mountain beech take over. Note how the mountain beech becomes progressively stunted as you climb higher to the bushline.
Trees give way to snow tussock, sub-alpine shrubs and, higher still, alpine herb fields. In late spring and early summer, these herbs flower, creating a glorious display of gold and white.
The lower section of the walk crosses moraine terraces deposited by past glaciers. The truncated spurs of St Arnaud Range are evidence of further glacial action at higher altitude. Advancing rivers of icecut off the ends of the ridges and, on the eastern side, gouged out the many small basins where small tarns now fill hollowsleft by the melting ice.