Grange, who missed most of last season with a torn knee ligament, turned in a time of 1 minute, 46.64 seconds and edged Sweden's Andre Meyher by a fraction of a second.
Ivica Kostelic of Croatia placed third followed by Italy's Cristian Deville. Will Brandenberg of the United States placed eighth.
A tricky top section of the course took a toll on the field with 30 of 80 contestants falling out of the competition during the first run, including American Bode Miller.
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