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The death of Christchurch woman Rosalie Anderson-Hill has now been referred to the coroner.
Detective Senior Sergeant Damon Well said they want to thank the public for coming forward with information relating to sightings of the 21-year-old.
"As a result of this information, we now have a greater understanding of Rosalie's movements on Sunday, October 25, through to Monday, October 26."
Her missing longboard was located by a member of the public.
Anderson-Hill died near Summit Rd in Heathcote Valley between Sunday and the early hours of Monday morning.
Her death was initially being treated as "unexplained" while police tried to piece together a timeline of her movements.
Tributes have been pouring in for Anderson-Hill via a Facebook group set up for friends and family to share memories of the woman.
It has been inundated with messages since its creation.
"I will always miss you. You were that funny, free spirited, friend I always adored and when we were together we just clicked," one post said.
"Still really don't know what to say. Thank you for being a beautiful part of our lives, you won't be forgotten," another said.
Anderson-Hill's body was located by a member of the public near the Cattlestop Crag.
Wells said police wanted to hear from anyone who was in the area on Sunday, or saw the woman walking in the Mt Pleasant, Lyttelton or Summit Road area overnight on Sunday through to Monday morning.
Anderson-Hill is described as having a slim build, approximately 160cm tall with dreadlocked blonde hair.
She was wearing a dressing gown with a hood, white and blue paisley-patterned long pants and black and white shoes.
Family were reunited with Anderson-Hill yesterday and a memorial service will be held tomorrow before she is buried in Diamond Harbour on Saturday.
Her 21st will also be celebrated belatedly as her birthday fell during lockdown.