What was supposed to be a brief spiritual pilgrimage turned instead into a fight for her life.
Upon her discovery, she left the park with her family and sought medical care.
And then the online frenzy began.
What started as a widespread plea for tips and support to find Courtier became an international sensation filled with vitriol and conspiracy theories about her disappearance.
Family members say they have since received exponential amounts of hate mail and comments, forcing them to shut down their social media and get new phone numbers.
Hundreds of comments on Facebook posts by the family say things like "hoax," "scammer," or "crazy". Online observers created private groups to hypothesize about the case. Some postulated that an online fundraiser was actually a fraud.
A Sheriff's sergeant was quoted in a television interview suggesting that Courtier's story didn't add up. His comments spread all over the country, stirring the controversy further, creating more hate toward the family, they say.
Jaime Courtier Strong, Holly's sister, spoke with The Spectrum, part of the USA TODAY network, about what happened and how the online frenzy has affected them.
“There are not holes in the story, there are no discrepancies. It just got blown very out of proportion," she said.
Let's start at the beginning.
'She was seeking a total disconnect from everything'
In September, Holly Courtier and her daughter Kailey Chambers visited Zion together to hike.
Courtier had lost her nannying job due to the pandemic earlier this year, and was traveling the country in a converted van.
Jillian Oliver, Courtier's younger sister, told the Los Angeles Times that Courtier is a "free spirit" who was prone to spontaneity and regularly fasted.
After having dinner together a few days before Courtier left for Zion, Oliver told the Times, "She gave me a big hug and said, ‘I love you so much.' She seemed a little choked up. Like she wasn’t going to see us for maybe a few weeks or something.”
Courtier spent a few weeks at her California home but then departed in the middle of the night in early October, leaving for Utah. She left her phone behind and did not tell anyone where she was going.
"She definitely was having a mental breakdown," Strong said. "She told us later she was seeking a total disconnect from everything. She really just wanted to be alone. She had no idea it would turn into anything it would turn into or the worry she would cause or what it would become."
Courtier arrived at Zion National Park on Oct. 6, parked her car in Springdale, and took a private shuttle to the Grotto area at 1:30 p.m.
That was the last time anyone saw Courtier for nearly two weeks.
She only had a hat, jacket, tank top, hiking boots, backpack, sweatshirt, blanket and hammock with her.
Oliver told the Times Courtier's roommate reported her missing and authorities triangulated Courtier was in Zion because she used her credit card to pay the entry fee.
Strong said Courtier had already begun a food fast to kick off her spiritual journey where she just wanted to "connect with nature and read her Bible."
Courtier told her sister that she took a big hike that first day, weakening her early in her trip.
After setting up her hammock in a vegetated area, Courtier went to sit on it and swung back, hitting her head hard on a tree, Strong said.
Disoriented, Courtier stayed by the Virgin River for days where she would scoop up the water to wet her mouth, swish it around, and spit it out, Strong said.
Courtier told Strong that she knew about the toxic cyanobacteria in the water from signs in the park and didn't want to drink it, but that she just needed to keep her mouth wet.
Oliver told the Times she thought maybe because Courtier fasted often, she could survive without food and water for a while.
Strong had established a GoFundMe fundraiser to "cover the costs of her search and possible aftercare when she is found."
While Courtier was still missing, the fundraiser garnered $12,010.
Strong said she established the GoFundMe because friends and family kept asking how they could help and "things were getting expensive."
"I figured it was the most public way for everyone to see where the money was going. The donations were mostly personal friends and family," Strong said.
The family organized its own independent search party filled with dozens of local volunteers and made a website.
Courtier's 19-year-old daughter became the spokesperson for the search efforts, leaving school and home to look for her mother.
"In simple words, it’s been absolutely surreal. I never in a million years thought I’d have to experience something like this," Chambers said. "It’s been a very emotional experience."