A Colorado coroner has determined that 20-year-old Susana DeForest died from altitude sickness after a hiking trip last month in the state. DeForest, from Collegeville, was hiking in Colorado’s Conundrum Creek Trail with three friends and became sick as the group hiked to the Conundrum Hot Springs. DeForest had reached an elevation of 10,367 feet when she died. The Coroner’s Office stated that the woman suffered from High Altitude Pulmonary Edema and High Altitude Cerebral Edema. The National Institutes of Health states that the condition is caused by a too rapid of an ascent or an inability to acclimatize to the elevation.