Luna the Terrier Dodged Yellowstone for a Month, Then Fell for a Pillowcase

For a little over a month this fall, the hardest animal to catch in Yellowstone National Park was not a wolf or a grizzly. It was Luna, a 10-year-old Jack Russell terrier who weighs about 20 pounds.¹⁷

On Wednesday, Oct. 14, 2026, she finally walked into a live trap. She has been reunited with her family from California.¹²

How to Escape a Cabin With a Do Not Disturb Sign

Luna's adventure began Sept. 10 in a cabin in the park's Canyon Village area. Her family had left her inside, with a Do Not Disturb sign on the door, while they visited Norris Geyser Basin, where dogs are not allowed.³⁷

The family believes housekeeping accidentally opened the door. Luna apparently read the sign as a personal mission statement and made sure nobody disturbed her for the next five weeks.⁵

According to Katie Boucher, the volunteer rescuer who later led the search, park staff chased Luna around that area for more than two hours before her owners even got back and found her missing.⁵⁷

A Small Dog, a Big Park and Very Reliable Automatic Doors

Yellowstone, the first national park in the United States, covers about 3,500 square miles across parts of Wyoming, Montana and Idaho.⁵ That works out to roughly 175 square miles per pound of terrier.

Luna made use of the space. People spotted her crossing intersections, strolling through employee housing and entering lodges through automatic doors, like a guest who lost her room key and decided not to make it anyone's problem. She did all this in a park that is also home to grizzly bears, wolves and other predators.²

Her owners stayed and searched for about another week, then went home to California without her. They were told she had probably died, possibly killed by a coyote.⁴⁷

Days after they left, word came that Luna had been spotted. The family contacted Boucher, president of the Norris Ark Training and Recovery Center in Norris, Montana, just north of the park.²⁴

Boucher said part of the problem was kindness. Locals and tourists calling Luna's name or chasing her set off her fight-or-flight response (the body's automatic choice between standing its ground and leaving immediately), which pushed her deeper into the park.²³ Luna is a Jack Russell. She picked flight.

She also had relevant work experience. Boucher said Luna spent her first year living on the streets before she was adopted, and credits that with her strong survival instincts.⁵⁷

The Bait Was Laundry

Volunteers skipped food as bait, since it could attract bears or other wildlife. In Yellowstone, a hot dog in a cage is less a trap than a dinner invitation to a much larger guest. Instead they used the family's scent: scraps from a T-shirt and a pillowcase.³⁴⁶

The clock was ticking. Boucher said this was the last week she could have searched, because colder weather could limit how long she could stay in the park. She had been sleeping at an RV park for seasonal employees that was set to close the following Monday.⁴

Then on Wednesday, Luna went for the pillowcase. That afternoon a veterinarian checked her over.²⁶

"She's underweight, but that's to be expected. She's alert and in good spirits," Boucher told the Associated Press.⁵

Boucher was in somewhat worse shape, emotionally speaking. "I was crying all the way up here from the park," she said.⁵

Luna is back with her family, a little thinner and presumably finished with sightseeing. Next on the agenda is putting that weight back on, and maybe hanging the Do Not Disturb sign on the inside of the door.