One of the most famous walks in the park is the Hooker Valley track (an easy 3 hrs return). It leads past Mueller Lake, crosses three swing bridges and ends at the relatively young, milky-grey Hooker Lake, which lies at the foot of Mount Cook. This proglacial lake started to form in the late 1970s due to the retreat of the Hooker glacier, which can be spotted at its far side. The lake’s temperature is typically lower than 2°C and you can see a few icebergs floating in the freezing cold water. However, that didn’t stop two young lads having a (very) short dip in the lake!