High Quality Content by WIKIPEDIA articles! Wanaka is a town in the Otago region of the South Island of New Zealand. It is situated at the southern end of Lake Wanaka, adjacent to the outflow of the lake to the Clutha River. It is the gateway to Mount Aspiring National Park. Wanaka is primarily a resort town but has both summer and winter seasons and is based around the many outdoor opportunities. Due to the growing tourism business and the increasing number of retirees in Wanaka, large growth is occurring, with a population increase of up to 50% in the past 10 years.