Jamison Watson hit two free throws with 11.4 seconds to go to put the Monarchs up 63-62.
Mark Morris was 10 for 10 from the free-throw line for the game.
Jack Shipley had 15 points and Ashton Harvey added 14 to lead the Monarchs.
MARK MORRIS 65, TIMBERLINE 62
MARK MORRIS (1-0) — Deacon Dietz 10, TKobe Parlin 3, Garrett Ness 3, Cole Busch 9, Rome Hendrickson 3, Jack Shipley 15, Jamison Watson 8, Ashton Harvey 14. Totals 26-65 (3-7) 10-10 65.
TIMBERLINE — Logan Campau 14, Nic LeDoux 3, Jeshua Hardie 14, Brooklyn Hicks 25, Joseph Piccolomini 0, Alex Wright 6 , Devin Wilson 0. Totals 25-63 (9-24) 3-11 62.
MMorris 13 16 20 16–65
Timberline 16 16 16 14–62