"It's a good feeling, the race was very tough, very bumpy."
Fifty racers finished the course out of the 73 who started the event, the largest women's field seen at a Continental Cup in New Zealand for many years.
Piera Hudson was the best finisher among the New Zealand entrants, taking 33rd in 1:56.64.
The men's and women's slalom races are due to be contested at Coronet Peak on Wednesday.
Results
Women's FIS ANZ giant slalom:
Wendy Holdener (Switzerland) 1:50.88 1, Anastasia Romanova (Russia) 1:51.30 2, Christine Scheyer (Austria) 1:51.43 3, Megan McJames (US) 1:51.45 4, Stephanie Brunner (Austria) 1:51.74 5, Stephanie Resch (Austria) 1:52.26 6, Kate Ryley (Canada) 1:52.40 7, Monica Huebner (Germany) 1:52.44 8, Denise Feierabend (Switzerland) 1:52.66 9, Ricarda Haaser (Austria) 1:52.67 10. Also: Piera Hudson (NZ) 1:56.64 33.