AUGUSTA — The Richmond boys basketball team’s first year in Class C ended how so many of its predecessors in the region has — in the regional tournament, at the hands of Dirigo.

Top-seeded Dirigo ended the first half with an 11-0 run and continued to pour it on in the second half for an 82-36 win in the Class C South quarterfinals Monday night at the Augusta Civic Center.

Dirigo (18-1) will face No. 4 Waynflete in a semifinal game Thursday at 8:30 p.m. Richmond ends its season 12-7.

Riley Robinson, the most outstanding player of last year’s tournament, led the Cougars with 30 points. Matt Holt led Richmond with nine points. Zach Small chipped in seven.

Richmond trailed by as much as 11 in the first quarter before Tyler Soucy hit a 3-pointer at the buzzer to pull the Bobcats within 22-14. A 3-pointer by Small early in the second quarter made it a six-point game, but that would be all of Richmond’s scoring for the half. Robinson sparked the deciding run with a bucket with 4:37 left and went on to score nine of the 11 points in the streak as the Cougars opened up a 39-22 lead.

After turning the ball over 13 times in the first half, the Bobcats gave it away six times in the first four minutes of the second half. That allowed the Cougars, led by Robinson’s 10 points, to go on a 20-2 run that extended the lead to 63-29 at the end of three.