Ralston was forced to spend 127 hours (over 5 days) in the canyon, surviving on his own wits and resourcefulness. He documented his experience in a journal, which became a crucial part of his survival.
With no way to free himself, Ralston is forced to endure extreme physical and mental hardships, including dehydration, starvation, and hallucinations. As the hours tick by (hence the title "127 Hours"), he begins to lose hope and contemplates ending his life. 127 Hours Isaidub