"It causes a lot of conflict on the playground," said Cindy Fesgen, assistant principal of the Discovery Canyon Campus school.
Running games are still allowed as long as students don't chase each other, she said.
Fesgen said two parents complained to her about the ban but most parents and children didn't object.
In 2005, two elementary schools in the nearby Falcon School District did away with tag and similar games in favor of alternatives with less physical contact. School officials said the move encouraged more students to play games and helped reduce playground squabbles.