Holden Bea threw four touchdown passes and rushed for another as the Panthers improved to 2-0 on the season.
Bea threw two touchdown passes to Sam Evers, including a 79-yard strike that put Washougal up 16-0 early in the second quarter.
Will Cooper and Prescott Lenhart also caught touchdown passes.
The Panthers will open 2A Greater St. Helens League play next Friday at home against Woodland.
WASHOUGAL 37, TOPPENISH 8
Washougal 9 14 7 7—37
Toppenish 0 8 0 0—8
W — Will Cooper 6 pass from Holden Bea (kick block)
W — Koby Johnson 26 FG
W — Sam Evers 79 pass from Bea (Johnson kick)
T — CJ Torres 5 run (Adian Villanueva pass from Torres)
W — Bea 4 run (Johnson kick)
W — Evers 5 pass from Bea (Johnson kick)
W — Prescott Lenhart 38 pass from Bea (Johnson)