A $500,000 reward is on offer to solve a young mother's disappearance in Queensland's remote Cape York more than a decade ago.
Mother-of-two Allison Bernard disappeared after a night out at a hotel in far North Queensland in February 2013.
The 23-year-old had been at the Exchange Hotel in Coen before disappearing between Archer River, near Coen, and her hometown Kowanyama.
Queensland police conducted a large-scale search of the area but no trace of Ms Bernard has been found.
An inquest last year was told the last person to see Ms Bernard was quarry caretaker Thomas Byrnes who has denied involvement in her disappearance
Ms Bernard is described as Indigenous, approximately 155cm tall, with a slim build and brown hair.
Police will announce the $500,000 reward for information on Wednesday.