DURHAM — Less than 48 hours after it stunned No. 1 Oyster River in the quarterfinals on a buzzer-beating 3-pointer, ninth-seeded Kearsarge extended its Cinderella run to the Division II boys basketball championship game.

This time, the Cougars left no doubt.

Noah Tremblay took the game over, shooting 10-of-24 from the floor for a game-high 23 points, and Kearsarge rode a monster first half to a 59-46 win over No. 5 Merrimack Valley in the nightcap game of Monday’s D-II final four at Lundholm Gymnasium.

Kearsarge (14-8) will face third-seeded Pembroke Academy (20-1) in Saturday’s noon Division II final. The Spartans advanced in the early semifinal game with a 50-42 win over No. 2 ConVal.

Kearsarge led 30-18 at halftime and 46-32 through three quarters. Benjamin Carl scored 10 points and Kyle Hernon had nine for the Cougars.

On Saturday night, in the quarterfinal round, Oyster River took a 49-47 lead with 24.8 seconds remaining on a 3-pointer from the wing. Kearsarge had the final possession, and freshman Adrian McCarthy answered Lewis’ huge shot with one of his own — a 3-pointer from the top of the key with less than a second remaining for the win.

Kyle Dube scored 22 points and grabbed seven rebounds for MV (15-6) on Monday. Griffin Wheeler had nine.

In the early game, Noah Cummings scored 20 points, Sean Menard added 15 and Pembroke used clutch free-throw shooting and defense to reach its fourth state final in the last 10 years.

Mather Kipka led ConVal (19-2) with 17 points, and Connor Buffum chipped in with eight.

Shea Shackford added nine points and a game-high 11 rebounds for Pembroke.

The game was a low-scoring grind throughout, the Spartans leading 21-20 at halftime and 37-35 after three quarters following a buzzer-beating 3 by Cummings. The Spartans finally created some separation late.