Whakatane's Karen Hanlen was undone by a perilous course in the fourth round of the UCI Mountain Bike World Cup in France yesterday.
Hanlen dropped out on the second of six laps in a race that claimed a significant number in the field.
She was chasing Olympic qualification in the final race to earn points for London, after rival Rosara Joseph crashed and broke her wrist during practice.
It was a serious blow for Hanlen and Joseph who were chasing a high placing to support their Olympic bids.
New Zealand is expected to earn a single elite women's spot for London when quotas are finalised by the UCI.