Shaminderjeet Kaur Brar, 34, was found dead on the side of Riverside Road by a passing driver on Monday.
She was reported missing on Feb. 12.
Abbotsford police Const. Ian MacDonald said a witness reported seeing Brar at about 8 p.m. PT on Saturday, Feb. 16.
MacDonald said police are now trying to narrow down the timeline of her whereabouts between Saturday night and the early morning hours of Monday Feb. 18.
Police are also asking for any information on sightings of Brar over the weekend, especially along or near Riverside Drive in the area where her body was found.
Brar had been wearing a dark pink hoodie, blue jeans and white runners.
Police are also asking anyone who may have had contact with Brar after Feb. 10 to come forward.