It was not immediately known why the 18-year-old was in Wyoming and how she got there.
Karimi was reported missing on Monday. Karimi's family last saw her at her home in the 2900 block of Queensbury Street in West L.A. around 7 a.m. that day.
Surveillance video showed the woman getting into her car in a parking lot after exiting a Vons grocery store. She was alone, and then drove off.
Karimi was supposed to be on her way to San Gabriel Valley Medical Center where she volunteers, but she never showed up. According to her family, she had no history of not showing up to things or going missing.