WELCHES, Ore. — A missing hiker who was found dead in the Mount Hood National Forest area was killed in a suspected cougar attack, according to the Clackamas County Sheriff's Office.

Wildlife officials said they believe it would be the first fatal wild cougar attack in Oregon history.

“This does have every indication that this is the first fatal attack of a human by a cougar in Oregon," said Brian Wolfer, watershed manager with the Oregon Department of Fish and Wildlife.

Related: What to do if you see a cougar in the wild

File: Man killed in Washington cougar attack

The body of 55-year-old Diana Bober, of Gresham, was found on Monday off the Hunchback Trail in Welches. She was reported missing on Aug. 29. The Hunchback Trailhead has been closed.

"We were given some hint an animal attack was involved yesterday but they needed to do more investigation," sister Alison Bober told KGW.

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The medical examiner's office said Bober's injuries were consistent with that of a cougar attack. U.S. Fish and Wildlife will determine the animal that attacked Bober, the sheriff's office said. The Oregon Department of Fish and Wildlife is assisting with the investigation.

"She had a sharp object she used, " Alison Bober said. "She had mace, she had a stick so the evidence is clear she fought hard."

Wildlife managers will attempt to kill the cougar responsible for the attack, deputies said. There are about 6,600 cougars in Oregon. The ODFW tracks conflicts with cougars.

“This is an unprecedented event in Oregon, we are asking people to avoid this area while we attempt to remove this cougar,” said Wolfer. “We don’t know what risk it poses to the public.”

Earlier this year, a cougar killed a man near North Bend, Washington. It was the second time in the last 100 years a cougar killed a person in the state.

Bober was an avid hiker. Family members reported her missing after becoming concerned that something may have happened to her while hiking, police said.

She was known to frequent the Gorge and Mount Hood areas.

"There's peace for us knowing what happened but there's a peace knowing she lived her life her way and she loved being in the outdoors," sister Alison Bober said.

On Saturday afternoon, authorities found Bober's car, a black Mazda Miata, near the Zigzag Ranger Station, a few miles from where her body was found. The Clackamas County Sheriff's Office said a mother and daughter hiking on Mount Hood on Aug. 30 found what police said was Bober's backpack and turned it in to the ranger station.

"She lived her life so fully all the way to the last minutes of it," her sister said.

What to do if you encounter a cougar

  • Cougars often will retreat if given the opportunity. Leave the animal a way to escape.
  • Stay calm and stand your ground.
  • Maintain direct eye contact.
  • Pick up children, but do so without bending down or turning your back on the cougar.
  • Back away slowly.
  • Do not run. Running triggers a chase response in cougars, which could lead to an attack.
  • Raise your voice and speak firmly.
  • If the cougar seems aggressive, raise your arms to make yourself look larger and clap your hands.
  • If in the very unusual event that a cougar attacks you, fight back with rocks, sticks, tools or any items available.

Read more about cougars from the Oregon Department of Fish and Wildlife