On Aug. 6, 2007, Christina Calayca set out on an early-morning jog in Rainbow Falls Provincial Park on the north shore of Lake Superior.
She was never seen again.
A Minnesota-based search and rescue team will make a final try to locate her remains next month.
When the search resumes on Sept. 17, the teams of cadaver dogs will focus along the Whitesand River, where cadaver dogs picked up a scent in the fall of 2008.
At that time, the area was deemed too dangerous to investigate.
When Calayca first went missing, the Ontario Provincial Police searched for more than two weeks before calling off the effort, saying they found little evidence of Calayca's movement in the heavily forested area.
They had used a helicopter with an infrared camera to try and pick up signs of Calayca, but the dense bush thwarted that efforts.
The park has a number of cliffs and steep drop-offs. By the end of the search, police said they were looking for a "non-responsive person."
Two police officers were injured during the search, and even a search dog got lost in the woods.
Police said they did not suspect foul play in her disappearance.
Calayca had been on a camping trip with her cousin and two men she knew from a Christian youth group.
In late May and late October 2008, Calayca's family held events in Toronto to honour the young daycare worker -- and in part to raise funds for a private search.
With files from The Canadian Press
