Police are piecing together what led to the death of Christchurch woman of Rosalie Anderson-Hill

Her body was found near Summit Road in the Port Hills, on Monday.

Police say they're treating the 21-year-old's death as unexplained, while they work out a timeline of where she was from Sunday to early Monday.

They want to talk to anyone who was near the Cattlestop Crag climbing rock area, or saw her in Mt Pleasant, Lyttelton or on the hills.

Investigations are focusing on a longboard she might have been carrying, which has yet to be traced.

Tributes are continuing to pour in on a Facebook page set up in her memory.