The Thunder built a 38-21 halftime lead, only to let it slip away in the third quarter.
Kelso won the third period 23-6, forging a 44-44 tie entering the final quarter, then pulled the game out down the stretch.
The Hilanders made 8 of 11 free throws in the fourth quarter and outscored the Thunder 43-22 in the second half.
Emma DuChesne led Mountain View with 15 ponits, while Carly Holboke scored 14 and Amica Cranston had 13. Loryn Musgrove scored a game-high 24 points for Kelso.
KELSO 64, MOUNTAIN VIEW 60
KELSO — Kailynn Rae 0, Taylor Flick 13, Brianna Sorenson 0, Jamilee Iddings 12, Taylor Leach 0, Sara Peterson 0, Loryn Musgrove 24, Kady Bruce 9, Brianna Salberg 6, Kalena Justin 0. Totals 21 (6) 16-27 64.
MOUNTAIN VIEW — Carly Holboke 14, Christina Lundy 0, Raina Shadle 2, Sarah Pongon 3, Emma DuChesne 15, Amica Cranston 13, Bailey Gaspar 4, Bailey Lindsley 9. Totals 23 (5) 9-13 60.
Kelso 9 12 23 20–64
Mtn. View 22 16 6 16–60
JV — Kelso won. Freshman — Kelso won.