Wesley Garth returned the opening kickoff 96 yards for a touchdown to provide the only points Lake Highlands would need in a win over Molina at Wildcat-Ram Stadium.
Lake Highlands (8-2, 6-1 Distirct 9-5A) got a pair of touchdowns apiece from running back Desmond Roland and backup quarterback Michael Ketchmark.
Lake Highlands, ranked No. 8 in The News' 5A poll, will face North Garland in a bi-district playoff game at 7:30 p.m. Friday at Richardson's Eagle-Mustang Stadium.
After Taylor Stephenson scored on a 44-yard carry, Jason Dann kicked a 31-yard field goal to give Lake Highlands a 38-0 halftime lead.
Randy Hernandez rushed for 47 yards to lead Molina (1-9, 1-6).