Undaunted, the NASCAR star ran through the parking lot to the grass plot where the kids were gathered, chanting his name.
It was an appropriate entrance, considering that Johnson was at Chase Avenue Elementary in his hometown to check out a running track that was built with a Jimmie Johnson Foundation/Lowe's Toolbox for Education Champions Grant.
"I thought, 'Well, since we're running around the track, I'll just run on in,'" Johnson said.
Johnson, the Sprint Cup points leader, ran a lap with some of the kids and his young daughter, Evie.
The school received a grant in 2010 to build the track and install a large grass plot that has baseball backstops on both ends.
Principal Sue Geller said the area had been a sloped dirt plot. "When the rains came, there were crevices that would be great for an archaeological dig but not for exercise," she said.
"That was the reality for Chase for 60 years," she said. "We never thought we'd get any grass. We just kind of accepted it."
The school not only got a grant from Johnson's foundation, but the school district added some funding, too.
Geller found out three months ago that Johnson wanted to visit the school in this blue-collar community on the eastern edge of San Diego's suburban sprawl.