AUGUSTA — Boothbay Region built its lead methodically but surely and won the Class C South girls’ basketball title night, defeating Madison 40-24 at the Augusta Civic Center.

Boothbay was led by Page Brown, who scored 19 points, and Kate Friant, who added 14. Faith Blethen, a 6-foot-1 freshman, pulled down 11 rebounds.

Boothbay (20-1) will take on Narraguagus of Harrington (18-2) in the state final at 7 p.m. next Saturday in Augusta.

It will be the Seahawks’ first Class C state title-game appearance since 1984, when it defeated Central Aroostook.

Madison (14-8) was hoping to make its first title-game appearance since 2010, when it lost to Calais.

Boothbay and Madison were meeting for the third time this year. The Seahawks swept the season series, including a 44-27 rout on Feb. 4. But Boothbay could take nothing for granted. Last year the Seahawks were the No. 2 seed and were upset in the quarterfinals by then-No. 10 Madison on a shot at the buzzer.

Saturday’s game featured a combination of heads-up defense, poor shooting and deliberate offenses in the first half as Boothbay took a 13-6 lead.

Madison had trouble penetrating the Seahawks’ 1-2-2 zone, with Blethen at the top. The Bulldogs shot only 17 percent (3 of 18) in the half.

Blethen, the Seahawks’ leading scorer in their first two playoff games, was held scoreless through three periods and managed three free throws in the fourth. But she was still a force on the boards and defense. On offense, Blethen drew double coverage and effectively passed.

Boothbay’s trouble was more about taking care of the basketball. The Seahawks shot 36 percent in the first half but also turned the ball over six times.

In the second half, Boothbay controlled play better and Brown scored on inside drives. Twelve of her points came in the second half.

Kayla Bess and Sydney LeBlanc had five points each for Madison.