Several ski areas are located near Ushuaia including Glacier El Martial (on Martial Mountains) and Cerro Castor. Opened in 1999, Cerro Castor is the southernmost full-fledged ski resort in the world. On Cerro Castor, it is possible to ski just above sea level. The summit reaches an elevation of above sea level, and consistently cool temperatures allow the longest skiing season in South America. Winter temperatures fluctuate between . It has ten elevation facilities and 28 ski trails for all skill levels. There are cafeterias, mountain huts, a ski school, a first aid room and a forest of beech. Snowboarding, sledding, and snowshoeing are also available at Cerro Castor, in addition to alpine skiing. It is located on the southern side of Cerro Krund, north of Ushuaia. The ski season is typically between June through October. In 2012 Cerro Castor hosted the FIS Freestyle Slopestyle World Cup, organized by the International Ski Federation (FIS), and in 2015 it hosted the Interski Congress and World Cup, organized by the International Ski Instructors Association, which was its first ever event in the Southern Hemisphere.