The Chieftains closed the game on a 23-6 run to pull away for the win.
Teaghan Cowles scored nine of her 15 points in the fourth quarter, when Columbia River outscored Evergreen 16-5. Marion Lilly also scored 15 for the Chieftains (4-0).
River coach Carl Click pointed to tough defense and improved shooting for the second-half turnaround.
Megan Bloom made six steals and Kate Kraft five steals to lead the defense, which forced a flurry of Evergreen turnovers in the fourth quarter.
Five players scored at least six points for Evergreen (1-2).
COLUMBIA RIVER 50, EVERGREEN 40
COLUMBIA RIVER (4-0) — Ellie Furth 0, Amara Moore 2, Marion Lilly 15, Kate Kraft 7, Teaghan Cowles 15, Holli Jo Chose 0, Gabrielle Collins 1, Katie Kolbe 0, Megan Bloom 8, Maddy Kessi 0, Emma Fisk 2. Totals 17 (3) 13-25 50.
EVERGREEN (1-2) — Hayley Avery 6, Stephanie Didenko 1, Moriah Doyle 9, Makenzie Smith 6, JaNae Callaway 0, Alyssa Smith 0, Madison Mitchell 0, Keilea Swearingen 3, Jazmyne Ogletree 0, Felicia Bahr 7, Lexi Burney 8. Totals 14 (1) 11-21 40.
C. River 9 14 11 16—50
Evergreen 11 14 10 5—40
JV — Columbia River 40-27. C — Columbia River 32-22.
