Greg Washington scored 22 points and Robert Franks added 14 as the Plainsmen locked up the No. 3 seed to the 4A district tournament.
Evergreen will host Heritage in the first round of district on Tuesday, while Battle Ground will host Skyview.
“They were on fire at the start,” Battle Ground coach Wes Armstrong said of the Plainsmen. “They hit four 3-pointers in the first five minutes. It was just matter of them making shots, and we didn’t.”
Devin Johnson paced the Tigers with 29 points and eight rebounds. Sophomore Rennie Mendoza had 10 assists and five rebounds.