Ms Okin was last seen alive on March 26, leaving the McKenzie Hut on her own. She was expected to return to Queenstown on March 27, but police were alerted on April 8 when she had not.
The official search was called off on April 22, after police had spent every day searching dense bush and could not find any sign of Ms Okin.
A private search was launched by Ms Okin's brother, Itamar Tas, on April 24, led by Israeli search and rescue expert Hilik Magnus.
The search was suspended on May 3 for two days because of heavy snow in the area.
Ms Okin's backpack and shoes were found well off the track just before darkness on May 15.
The next day her body was found near Roaring Creek, a river described at the time as a "proper boulder course" fed from three major sources. Ms Okin was caught up within the creek area.
Coronial assistant Gary Binney, of Dunedin, said Ms Okin's inquest was expected to last much of the day, with at least six witnesses being called to give evidence.
• Three inquests are expected to be heard in Queenstown the day before Ms Okin's, on April 28.
Alan Leslie Beck (49), of Melbourne, whose body was found on March 12, 2008, 15m under an ice slab on Mt Aspiring at Bevan Col on the Bonar Glacier.
Leonard Alexander Phease (19) of Dunedin, who died on July 26 after falling 100m down a steep gully in Mt Aspiring National Park while traversing an icy section of track just below the Liverpool Hut.
John Bernard Pawson (48), of Wanaka, who died on November 27 after falling 800m from near the summit of Mt Aspiring.
A fourth inquest may also be held on April 28, into the death of Peter Thomas Lockett, who died as a result of a car crash.
