ST MORITZ, Switzerland, Dec 10 (Reuters) - American great Lindsey Vonn, building towards an Olympic comeback at the age of 41, was fastest in training for the first women's downhill of the Alpine skiing World Cup season on Wednesday.

Vonn, the 2010 Olympic downhill champion and a four-times overall World Cup champion with 82 wins, set a time of one minute, 30.95 seconds down the Corviglia piste in the Swiss resort of St Moritz.