The "fog," as she called it, lasted for months, maybe years. And there was no single moment of recognition that pulled her out of her depression and got her moving in the right direction again. But somehow, she began to see that she needed to find the strength to keep going.
"Things were getting better, you know, things were more stable. Moving here was good. Going to school was good. Belonging to a church was good," Hochhalter said.
Having the support of family and friends was essential, she said. And so was the ability to forgive her attackers -- Dylan Klebold and Eric Harris.
"I realize that they were sick. They were very angry. There was something vastly mentally wrong with them," she said. "And so, I decided, I'm not going to hold on to that anger. What happened happened. And I can focus on what I can do with my life rather than holding on to the anger towards them over why my life is the way it is now."
"A lot of the way I look at Columbine now is how it's changed how I think, how I live my life day-to-day. ... I'm a little more of a risk taker," shooting survivor Valeen Schnurr said.
Schnurr was inspired to become a social worker in the Rocky Mountains because of what she went through that day.
"I feel like there's a level of empathy I can give to my clients, because I've been there. I've been in a hard situation and I've been able to get out of it. And it's being able to give my clients hope that there's a life on other side of hard times. And I think that's ... why I took the job I did," she said.
She was in the library, hiding under a table with her friend Lauren Townsend when they were both shot. One of the shooters asked her if she believed in God.
"I was afraid that if I said yes they would shoot me," she said. "If I said no I would die not professing my faith."
She said yes.
She grew up fast after that day.
"The best way I can explain it is it's a loss of innocence," Schnurr said. "Thinking that the world is perfect and, you know, nothing's going to get in your way. I mean when you're 18 years old, you don't think about your own mortality. ... And I think the difference is now I know life is short. And life can be taken from you at any second of any day. ... And you know that you have to live for today, you live the best you can every day, because there may not be a tomorrow."
She still struggles with survivor's guilt: Her friend Lauren died that day.
"It's still hard. I don't think you find peace in the death of a friend, but you never get beyond it," she said.
Schnurr does keep in touch with the Townsend family. She said being able to share her life these past 10 years with them has been a comfort for all of them.
She finally stopped waking up at night, but she still has a hard time planning for the future.
"I look in the mirror every day and I have a permanent reminder of what happened 10 years ago," she said. "And you just have to find a balance of not letting it bother you as much and just accepting yourself for who you are. And, you know, I feel like I've been able to do that. And that I love myself."