Please check the location of this cache on a map before attempting. There's only one main way to get to this cache, which involves a ~1100m ascent from the valley floor. The track up through the trees is well marked, but quite steep. Further on above the bushline, the track is not very obvious, but follows a jagged ridge to the summit.
The cache itself is a 500ml lock-n-lock style cylindrical, fully sealed container. There is only room for very small trades - it's probably best to treat this as a logbook only cache. Please cover this cache well as keas will destroy it if it's left accessible. You're going to need to dig for this cache if attempting in winter time! Coordinates were averaged over 300 readings, ~3m accuracy.
This cache is set high in an exposed alpine environment that is prone to weather changes at any time. Please ensure you plan for this when attempting this cache. ie. think about what clothing, footwear, food, water, first aid, snow equipment and maps you need to bring. You should also sign in your intentions and check conditions at the local DOC office before setting off (But don't forget to sign out when you get back). This cache is only suited to physically fit persons and is not suitable for young children.
Don't forget to take your camera - the views from the ridge and the summit are just stunning, and you can see directly into the back of Mt Rolleston and the Crow Glacier. For a fast way off the mountain that's easy on the knees, consider running down the long (700m vertical!) soft shingle scree that drops from peak 1760 into Rough Creek, then out the creek to the road. Only attempt this in clear weather as the Creek can turn dangerous after heavy rain. Enjoy!