In the opening few minutes, the Lady Hawks (27-0) forced turnovers, got big rebounds and caught fire from 3-point land.
Washington County, which has won three consecutive region titles, made four 3s in a hurry as it opened up a 24-14 lead through a quarter.
Shonterria Kitchens and Allisha Gray shared the scoring load, with the duo combining for 21 points in the first quarter. Gray ended up with 30 and Kitchens with 19.
Azia Gibson scored 12 points to lead Westside (23-4).