Isaiah Smith scored 19 points and Rian Bassett 18 as the Chieftains withstood late pressure from the Falcons to remain unbeaten in the 3A Greater St. Helens League.
After scoring just 13 points in the first half, Prairie recovered some to outscore Columbia River 31-17 in the final two quarters.
Reece Burnett led Prairie in scoring with 11 points. James Phillips and Preston Brooks each had 10.
COLUMBIA RIVER 51, PRAIRIE 44
PRAIRIE — JaMariay McDonald 1, Reece Burnett 11, Mason Pack 6, James Phillips 10, Preston Brooks 10, Spencer Jordan 6, Jacob Austin 0, Ronnie McPherson 0. Totals 15 (4) 10-17 44.