Competing in the four-run combined time major championship format over two days, the QAS bobsleigh pilot was 11th fastest in run one, seventh in run two, 10th in run three and ninth in the final run to finish in a total time of 3:59.58.
The event winner 1.76 seconds ahead of Walker on her home track was Kaysha Love of the USA, Laura Nolte of Germany was second and another American, Elana Meyers-Taylor was third.
Walker still holds the track record for Lake Placid set 12 months ago, with no athletes able to improve on the time which saw changing weather conditions throughout the two days of competition.
A heartbroken Walker commented after the race.
“Certainly not the race I had prepared or planned for all season.
“I got extremely sick with a viral infection a day or so out from the race. I thought I would be able to still challenge for what I worked so hard for, but my starts were unfortunately so weak which left me on the back foot from the get-go!
“I gave it everything I had and that’s all I could do with the cards I was dealt! Heartbroken but it is what it is.”
Walker will now focus on the two-woman World Championship event in Lake Placid alongside brakewoman Kiara Reddingius on March 15 and 16.
Others in action in Lake Placid competing for Australia included Nicholas Timmings 20th in the men’s skeleton event and in the two-man bobsleigh, Rhys Peters and Benjamin Frost were 27th & Cam Scott and Patrick Castelli 28th.
IMAGE - Bree Walker in action at Lake Placid
© Viesturs Lacis