Jameel Morton scored 17 points but the Trappers fell short in the first round of the bi-district tournament in Olympia.
The No. 3 seed from the 3A GSHL, Fort (13-7) faces a loser-out game against Lakes on Friday in Olympia.
Spanaway Lake (16-6) finished No. 2 in the Pierce County League. The Senitinels took charge by outscoring Fort 20-7 in the third quarter to take a 45-39 lead.
“The kids battled tonight,” Fort coach James Ensley said. “But (Spanaway Lake) buckled down on defense in the second half.”