Ski jumpers typically go 60 mph or more. This speed is calculated when a ski jumper is going down the in-run, prior to taking off.
A ski jumper's high speed makes balance critical in the sport. Since the ski jumper is traveling at such a high speed, falling during the in-run phase is costly. After the in-run stage, ski jumpers take off and begin the flight stage. When in flight, the ski jumper is usually 10 to 15 feet off of the ground. It takes less than 10 seconds from the start on the in-run to landing after the jump.