Kelsey O'Brien scored all three of her goals in the first period while Rocio Fesembeck added two early goals as Santa Barbara High School raced out to a 6-0 lead after one period and cruised to a 13-4 Division 1 quarterfinals win against Irvine.
Erin McGeoy scored twice in the second period as the Dons led 9-0 at halftime as Irvine could never solve Santa Barbara goalkeeper Maddie Trabucco who did not play after halftime.
Top-seeded Santa Barbara has won 20 straight games as they advance to Wednesday's semifinals to be played in Irvine.
Meanwhile San Marcos lost on the road at second-seeded Foothill 13-5. The Royals end a terrific season that saw them win their first playoff game since 1997.