The Raiders bested 15 other teams for the title. Harrison was third at 318, trailing runner-up Lambert (315).
Michael Sheahan placed second with an even-par 72, three shots off the lead. John Yi and Nick Orrell-Jones each shot 75, while Connor Edison shot 77.
Walton will face Mount Paran Christian on Tuesday at Indian Hills Country Club.
Harrison was led by Luke Schneiderjans’ 78, Sam Maryland’s 79, Chad Barfield’s 80 and Nick Bell’s 81.
The Hoyas will conclude the North Georgia Invitational on Tuesday at The Farm in Rocky Face.
Lassiter 11, Woodstock 5: Brendan Flatt had three goals and two assists for the Trojans in the Area 2AAAAAA game.
Ryker Martin had two goals and an assist, while Pierce Smith added two goals.
Lassiter (2-3, 1-1) led 4-3 at the half before outscoring Woodstock 7-2 in the second half.
Parker Styles had 16 saves and also scored a goal for the Trojans, who will play at Wheeler on Tuesday.