Add Yahoo as a preferred source to see more of our stories on Google. Some scary and heartbreaking mountain lion activity in the state of Colorado has been alarming people over the last several weeks.

A solo hiker who authorities believe was killed by a mountain lion on a remote Colorado trail on New Year's Day was not the first person to encounter one of the predators in the area in recent weeks.

After a fatal mountain lion attack killed a woman hiking in January 2026, a separate sighting forced a trail closure. A woman was killed in Colorado’s first fatal mountain lion attack in 25 years.