It is best to go when it has been dry for at least a few days and there is no mist on Mt. Cargill.
Mostly fully-bolted sport routes between grade 15-20: https://www.facebook.com/media/set/?set=a.313160255814.184803.2080691658...
Some background on Mt. Cargill: http://en.wikipedia.org/wiki/Mount_Cargill
About 15min. drive from the city centre. Access from Pine Hill via Cowan Road, park by tower and walk about 2-5min. down a rough track on the far side (from the road) of the building, abseil down from Double Bolt Belay at one of two anchor points. The right hand DBB, as you approach, is the easiest for descent.