The findings from an investigation into the deaths of four people at Australia's biggest theme park will be released on February 24.

Kate Goodchild, Luke Dorsett, Cindy Low and Roozbeh Araghi were killed on a ride at Dreamworld on the Gold Coast in 2016.

The four died when a raft on the Thunder River Rapids ride collided with an empty vessel.

Two children who were also on the raft were able to escape.