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Woman killed in suspected mountain lion attack while hiking in northern Colorado

The first fatal mountain lion attack in Colorado in over 25 years occurred on a remote trail, prompting euthanasia of two lions and ongoing investigation by wildlife officials.

  • On Thursday, a woman was found dead on the Crosier Mountain trail after hikers reported a nearby mountain lion around 12:15 p.m.; this is Colorado's first suspected fatal mountain lion attack in more than 25 years, authorities said.
  • An estimated 3,800 to 4,400 mountain lions live in Colorado, and CPW says winter movement following deer and elk raises encounter risks; Van Hoose said, 'Because mountain lions are really common in this area we do expect to have conflicts.'
  • Hikers on the Crosier Mountain trail reported seeing the cat and then finding the woman unresponsive around 12:15 p.m.; a physician among them did not find a pulse, and the victim was pronounced dead at the scene.
  • Responding teams closed all Crosier Mountain trailheads and carried out ground and aerial searches, locating two mountain lions that Colorado Parks and Wildlife officers euthanized near the scene.
  • CPW pathologists will necropsy the euthanized lions to test for human DNA and diseases like rabies and avian influenza, while investigators determine if one or multiple animals were involved.
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A woman found dead on a Colorado hiking trail is believed to have been killed by a cougar. The woman has signs of a cougar attack, but a final verdict will not be known until an autopsy is performed next week. If a cougar, also known as a mountain lion, is indeed responsible for the death, experts say it would be the first time since 1999 that a man...

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Coloradoan broke the news in on Thursday, January 1, 2026.
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