PENACOOK — The sixth-seeded Belmont girls soccer team was hardly at full strength Tuesday, battling illnesses and injuries in its first Class M semifinal game in four seasons.

Second-seeded Campbell likely didn't notice.

Belmont went toe-to-toe with the Cougars for about 110 minutes of playoff soccer, until Campbell forward Shawna Trunca followed her own blocked shot into the far corner to snap a scoreless tie in double overtime. The goal ended a tremendous back-and-forth battle that for nearly two hours, could have gone either way.

"There's no reason to not believe in this group," Belmont coach Jim White said after the 1-0 loss. "They will absolutely give everything they have, and they did tonight. It's really heroic what they did. Really inspiring."

Campbell survived to reach Friday's championship game. The Cougars get No. 1 Fall Mountain at 5 p.m. at Southern New Hampshire University.

After a fairly even first half, momentum shifted from side to side through the second half and overtime. First it was Campbell's Casey Mellen, six minutes into the second half, belting a shot from the top of the penalty box that hit dead center on the crossbar. Moments later Belmont's Mikaela Guertin made a run down the right side for a shot that Campbell goalie Hayden Lieth fumbled briefly at her goal line before securing. With 13:25 to play in regulation Trunca, the fastest player on the field, dribbled down the left side and crossed in front to an open Olivia Planty, who stumbled on the shot, allowing Belmont goalie Courtney Clary (10 saves) to calmly scoop up the save.

"Because it was so back and forth and so even, it felt like playing ourselves," said Belmont defender Davita Elliott, who stood alone in front of her own goal to boot away a potential goal in the first half. "We were just trying to give it our all."

The back-and-forth battle seemed to grow in intensity as regulation waned down. With under nine minutes to play Belmont's MCKenzie Phelps charged toward the right post with the ball, but with one player to beat, her shot was smothered by the tackle of Campbell sweeper Liz Pettis. Just four minutes remained when Campbell's Sarah Vance found space at the top of the box to Clary's right, only to have Elliott separate her from the ball with a perfectly timed step. There was under a minute to go when a through ball sent Trunca in alone with a head of steam and Clary came sliding to the top of her box to break up the play.

Chances abound, the game went to overtime tied 0-0.

"They support each other really well," Campbell coach Bob Gannon said of Belmont's defense. "They double the ball; they'd have one person come up and slow us down and stop us, and then another person would come in so you couldn't make a second move around them. ... We know how to get around it, we just couldn't."

The Cougars worked the ball down field and forced Clary to make a tumbling save in the first minute of overtime. Then they slowly took the game over territorially. Aside from a rush by Phelps that was contained at the center of the box, Belmont's chances were few over the near 30 minutes of overtime.

There was 15:22 left in the second OT when Trunca made a nice move to create an angle from close range, but her shot was smothered by Elliott's slide tackle. Trunca willed one in the goal about four minutes later. Her initial shot from about 20 yards was blocked by Belmont's Kim Allen, but Trunca pounced on the rebound, firing the ball past Clary's full-extension dive to the right corner.

The Raiders enjoyed their best season since their 2005 championship team. They finished with a pair of postseason wins and a 14-5 overall record.

"It was really hard, but I'm actually not disappointed," Elliott said. "I'm ready to come back next year and do it all over again."

Belmont will graduate 11 seniors, including Rachel Macpherson and Ginny Rice in the midfield, Lauren Prescott up top and Lauren Harrison in the back.

"We're going to really relish this because there's no guarantee that you can get to a semifinals again," White said. "And we're really going to miss the leadership of the seniors. You can say all you want about all these young players, but it was really the leadership of the older kids that really led us. I was proud of every kid, but the seniors really set the tone for the program. Hopefully that attitude will be passed on."