"I never expect to win an event. There's always so many variables and anything can happen on race day."
Hastings was the first female with a time of 20m 50s, ahead of Frances James (21m 54s) and Lynette Deacon (22m 44s).
She said she hoped she would podium overall but did not expect to win.
"It feels amazing to win this race. I'm super stoked that I not only won, but I also pedalled the six stage.
"I started off pretty good, not too tired on the hills but then the last hill up to Box of Birds was hard and I had a bit of a bad run down there due to being tired."
Event director Craig Murray said race two was "epic" and the team delivered another great event with more than 500 riders hitting the start line.
"Eyes were on the weather all week and the forecast was very accurate with heavy rain dropping just after prize giving which was great.
"We designed a different style of trails compared to race one and turned up the dial on technicality for both the short and long categories. We are looking forward to changing it up again for race three."
Race three, which doubles as an Enduro World Series qualifier, is sold out and takes place on February 22, 2020.