Association, Regional Performance Centres (RPCs), Karapiro Rowing and Ruataniwha Rowing. RPCs provide a pathway for rowers to compete for selection in national representative crews as well as providing a high performance training environment for rowers. Karapiro Rowing and Ruataniwha Rowing operate and maintain the country's two main rowing venues: Lake Karapiro near Cambridge in the North Island, and Lake Ruataniwha near Twizel in the South Island. Events National Club Championships – First held in 1888 and only fours and single sculls competed. Now it is held alternatively at Lake Karapiro, Cambridge, and Lake Ruataniwha, Twizel. The event is now held over 5 days and more than 60 events are raced. Masters Championships – These are held annually and a rower may compete as a masters rower from the beginning of the year during which he or she reaches the age of 27. New Zealand University Championships – Are held annually and the top prizes include The Ashes (Overall NZU Rowing Champs Winners), the Tamaki Cup (Championship Women's Eight), the Paul Griffiths Cup (Championship Women's Four), and the Hebberley Shield (Championship Men's Eight). New Zealand Secondary School Championships (Maadi Cup) – The regatta is the largest school sports event in New Zealand and is held alternatively at Lake Karapiro, Cambridge, and Lake Ruataniwha, Twizel. 'Maadi Cup' is the name given to the regatta and the cup for the New Zealand Secondary Schools Boys' Under 18 Rowing Eights which is raced at the regatta. The top prizes at the regatta are the Maadi Cup, Springbok Shield, Levin Jubilee Cup, Dawn Cup and Star Trophy. National teams Rowing New Zealand selects Elite, Development, Under 23, Under 21, Junior and Under 18 National Teams through selection camps and trials process. The Elite National Team represents New Zealand at the highest level of competition, either at the Olympic Games, World Championships or the Rowing World Cup. While the Olympics are held once every four years, the World Championships are held every year. The Rowing World Cup comprises 3 regattas held each year and overall winners are determined by points that are awarded to the top finishing boats at each event. The Under 23 National Team competes at the Under 23 World Championship regatta each year while the Under 21 National Team competes at the Youth Cup Regatta in Australia. The Junior National Team competes at the Junior World Championships each year and the Under 18