Kyndall Jack, 18, was found this morning on a cliff near Holy Jim Falls in Cleveland National Forest after her friend Nicholas Cendoya, 19, left her behind because she had a sprained ankle.
The two were dehydrated but otherwise fine.
Cendoya was found barefoot and wearing shorts.
"He's a healthy young man, and he's pulling through. We're treating as we can," Dr. Matthew Kaplan said, who is treating him at Mission Hospital.
The pair went for a hike on Easter Sunday, but somehow ended up lost and couldn't find their way back to the car.
Jack's father said Cendoya left her because he was dehydrated and confused. When he was rescued, he believed Jack was already found.
"Nicholas obviously was disoriented because of dehydration…he thought that Kyndall had already been rescued," he said. "He told us, 'I haven't seen her for a day. I think she's already been rescued.'"
Once Cendoya was found, authorities put the search for Kyndall on high gear.
It was only after a nearby hiker reported hearing distressed screams that they were able to locate Jack.
Dogs and helicopters roamed the area and finally found her in the morning hours.
Before she was found, her family worried she was injured and would never be located.
Her mother wrote a message on her daughter's dusty car windshield, reading, "Kyndall - we r looking wont stop love you mom," signed with a heart.
Captain Muir said the two went off the trail of their hike and into the waist-high brush with rocky terrain.
The two called 911 and said they were about a mile away from Jack's car, but Muir said when you're disoriented, your sense of direction is off.
"When you're disoriented because you're out of breath and tired and you think you're one mile away, you could be potentially three or four miles away," he said.
The hike is in an area around the national forest in the Santa Ana Mountains, lying on the border of Orange and Riverside counties.
The trail has an elevation ranging from 2,000 to 4,000 feet.