Lake Karapiro is a simulated supply lake on the Waikato River, 30 kilometers (19 mi) south-east of the city of Hamilton in New Zealand's North Island. The lake was framed in 1947 by damming the Waikato River to store water for the 96-megawatt Karapiro hydroelectric force station.The lake, viewed as one of New Zealand's best paddling venues, facilitated the World Rowing Championships in 1978 and 2010, and in addition the paddling occasions for the 1950 British Empire Games. Lake Karapiro substitutes with the South Island's Lake Ruataniwha in facilitating the New Zealand national paddling titles and the New Zealand auxiliary school paddling titles (Maadi Cup). Rowers who train on the lake generally live in adjacent Cambridge. An International Rowing Federation assessment board went by Lake Karapiro in March 2006 and said in its report that it was one of the most attractive courses on the planet they had seen and that the lake was a standout amongst the most pleasant in the world.