Miranda Lomax scored 11 points, and the Lumberjills held Tumwater to under 50 points for just the third time this season.
However, the Thunderbirds (20-1) sent R.A. Long (10-11) into the loser-out bracket of the 2A district tournament by jumping out to a 12-0 lead and never looking back.
R.A. Long will face Columbia River at 7:45 p.m. Monday at Ridgefield High School in a loser-out game, while Tumwater faces Black Hills in the semifinals.
TUMWATER 48, R.A. LONG 28
R.A. LONG (10-11) — Miranda Lomax 11, Myah Bodily 0, McKenna Leff 0, Jadyn Terry 2, Makayla Jenkins 0, Maddie McCoy 0, Kailey Sirnio 4, Grace House 2, Maria Sheldon 0, Bobbi Clark 1, Jayla Clark 8. Totals 11 (1) 5-6 28.