The Roseville Police Department alerted the public on September 30 that Glenneta Belford, who has dementia and is mostly nonverbal, has disappeared.
"Help us locate a missing person," the police department said in a statement. Facebook and by speakers throughout the community.
Logan Hultman, Kashton Claiborne and Makenna Rogers, all 10 and 11 years old, Hope Claiborne heard the call and immediately went into action.
"My friends Hope and Makenna were joking and heard a helicopter saying that a 97-year-old lady was missing," Logan told CNN.
"So they came to get me and my friend Kashton and told us about the missing lady. We all got our bikes and started looking."
The four children walked around the neighborhood, on the sidewalks, streets and nearby trails. They also searched in a park near a local school.
They even climbed the top of a hill for a better view, because police said Belford was known for hiding. But as Logan got off his bike, he scraped his arm and leg.
Slightly disturbed but not discouraged, the group returned to Logan's house to apply bandages and dinner before resuming their mission.
Almost two and a half hours after Belford's death, they saw her.
"She was talking to herself and kept saying 'Go away, go away, I'm talking to my friend', but no one was there," Logan said. "Hope called 911 and we waited with her until they arrived."
CNN contacted Belford's family for comment, but did not receive a response.
Logan said the group of friends were excited and happy to have found the woman safe.
"We had a party at my tree house eating goldfish and watching TikToks to celebrate," said Makenna.
Alyssa Hultman, Logan's mother, said parents were "humiliated and proud" of their children for their help.
"They are a large group of thoughtful children and events like these that will really help shape them for their future," added Kristina Rogers, Makenna's mother.
Roseville Police Department shared a photo of the group in Facebook and said dispatchers were surprised to receive a call from "junior detectives".
"This is a great example of our exceptional community coming together to help," Roseville police said. "This proves a great point, age is just a number and anyone can help in a time of need."
When asked why they decided to help, Logan, who now wants to be a detective when he grows up, replied, "Because when someone needs help, you help them."