Indoor skiing is done in a climate-controlled environment with artificially produced snow. This enables skiing and snowboarding to take place regardless of outdoor temperatures. Facilities for both alpine skiing and nordic skiing are available.
Fortum Ski Tunnel in Torsby, Sweden
Exterior view of an indoor ski slope
Some ski halls form parts of larger wintersports centres - above is the ice hockey rink at MtTheBarton (now Ice Arena), Adelaide
Snowmaking is the production of snow by forcing water and pressurized air through a "snow gun", also known as a "snow cannon". Snowmaking is mainly used at ski resorts to supplement natural snow. This allows ski resorts to improve the reliability of their snow cover and to extend their ski seasons from late autumn to early spring. Indoor ski slopes use snowmaking. They can generally do so year-round as they have climate-controlled environments.
Snow gun in operation at Camelback Mountain Resort in the Pocono Mountains of Pennsylvania, United States
Pump house and air plant combination
Rear view of snow cannon at Mölltaler Gletscher, Austria, showing the powerful fan
A snow making machine at Smiggin Holes, New South Wales, Australia