Robert Mitchum's granddaughter was originally cast in the lead female role. One other actress backed out from playing Kate because of the controversial material until Brooklyn finally signed on less than a month before production started.
Director Travis Mills insisted that actors Dylan Bronte and Brooklyn Wilde remain in the mining tunnel and not be allowed to see sunlight during production lunch breaks in order to increase the psychological state of their situation.
For the scene where Dennis crawls out from the tunnel, director Travis Mills climbed into the small hole full of crumbling rock with actor Dylan Bronte, assessing the safety of the location. There was only enough space in this location to belly crawl out of the opening.
Filmed in ten days for less than ten thousand dollars.
During the scenes filmed at the frozen waterfall, large pieces of ice broke loose while the actor and filmmakers were underneath. Thankfully, the ice did not hit anyone when it fell and the necessary takes were completed.