Michael Schumacher did not reduce his speed significantly after going off-piste prior to his accident, French prosecutors said.
The investigators said the Formula One champion tried to reduce his speed, before one of his skis hit a rock, causing Mr Schumacher to fall.
The investigator added that Mr Schumacher was following the rules imposed in the French resort.
The racing driver, who suffered a severe head injury while skiing off-piste in the resort of Meribel in France last Sunday, remains in an artificially induced coma.
More top news
Britain's highest court will rule on whether the government requires parliament's approval to get Brexit under way.
New sentencing rules mean serious speeding offences will be met with a 'clear increase in penalty'.
Donald Trump has wasted no time making his mark on international matters as well as domestic. So how will his presidency affect the world?