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.

Colorado has a few thousand mountain lions, but a mountain lion attack on a human is rare, and a fatality – like the woman who died in a suspected attack Thursday in Larimer County – is even rarer.

In the months before a deadly mountain lion attack in Glen Haven, Colorado, locals in the area reported a series of encounters with big cats. From October through December, mountain lions killed pets, ...

A woman’s body was found on a trail on Crosier Mountain this week, with a mountain lion nearby. By Chris Hippensteel A woman found dead on a Colorado hiking trail on New Year’s Day is believed to be ...