A hiker missing in Mission Trails Regional Park was found in Scripps Ranch, after she hiked until she saw a house.
San Diego Police (SDPD) say the hiker's friend called police at 12:25 p.m., telling them her friend had called to say she was lost and disoriented.
Search and rescue crews, as well as a helicopter, began searching at the Father Junipero Serra Trail near Mast Boulevard at 1 p.m.
Zaira Hernandez, 25, did not have any food or water and, though experienced, had never entered the park from the Junipero Serra trail.
"This is a vast area with lots of hiking trails," SDPD officer Andrea Brown said.
Officers initially thought she may have followed a group of hikers in an attempt to find her way out of the park, but she got lost.
Officials said she eventually kept hiking and knocked on doors in a Scripps Ranch neighborhood until someone called for help.
"All I can say is, thank God," said Hernandez's mother, Gloria Coronado. "I came here all the way just asking God, oh please, please."
No further information was immediately available.