Ski jumping hill

They vary in size from temporary handmade snow structures to permanent competition venues.

At the top is an in-run where the jumper runs down to generate sufficient speed, before reaching the jump.

This allows the jury to regulate the speed of the jumpers in varying wind conditions, by shortening or lengthening the distance along the in-run.

The landing slope has a smooth curve which closely follows the profile of the ski jump; this means that the skier is never more than about 6 meters (20 ft) above the ground.

[1] The speed of the skier is normally measured about 10 meters (33 ft) before the end of the takeoff; jumpers can reach speeds of 95 kilometers per hour (59 mph) on large hills and 105 kilometers per hour (65 mph) on ski flying hills.

[2] The classic Nordic jump ramp for horizontal distance differs from the higher angle freestyle kicker takeoff which emphasizes vertical height to enable aerial flips and twists.