Jemima Montag finished fourth in the 20km Race Walk with a time of 1:28:17 at the World Athletics Championships.
Kicking off at 1:10 PM local time in Oregon, Montag and Rebecca Henderson took off and settled into the race.
Montag went through halfway in sixth with a time of 44:14 and Henderson in 27th with a time of 46:56.
The fourth-place finish by Montag puts her at the second highest finishing position of any Australian woman.
Henderson finished 20th with a time of 1:34:38.