Palmer Goecke scored 20 points as the Falcons finished the 3A Greater St. Helens League co-champs with Columbia River, both 5-1.
Prairie and River will play a seeding tiebreaker at 6 p.m. Saturday at Fort Vancouver.
Seth Hall had 11 points in the regular-season final for River, and Matthew Kogler lead the team in rebounding with eight, plus two blocked shots.
PRAIRIE 73, FORT VANCOUVER 30
FORT VANCOUVER — Ronnie Lieno 7, Ronald Owens 9, Mitchel Cooper 3, Ryan Komlosi 0, Miracle Alford-Lewis 0, Kyron Lowe-Ash 3, Norman Brown 6, James Husband Jr. 4, Tyshawn Ford 0. Totals 12 (5) 3-4 30.
