DURHAM, N.H. – Sarah Potomak, the best freshman in college women’s hockey, waved the large “M” on her maroon jersey in celebration as teammates mobbed her, celebrating another Frozen Four victory that sent the Gophers to another title game.

For a fifth straight year, the Gophers are in the national championship game, sent there with a 3-2 semifinal victory in overtime Friday night over WCHA rival Wisconsin.

They’ll face unbeaten and top-ranked Boston College (40-0-0) Sunday afternoon with a chance to win a fourth championship in five years and improve to an NCAA-best six championships.

“We are thrilled to be going to a fifth straight championship game,” coach Brad Frost said.

It took a thrilling sudden-death overtime game to get there.

Potomak scored the game-winner 15 minutes into extra time. Her goal capped an exhilarating and physical meeting between familiar foes, meeting for the sixth time this season, a series split three games apiece.

Potomak, 18, was named the NCAA’s top freshman Thursday night and scored what she called the biggest goal of her life Friday, setting off a postgame dance party in the Gophers’ locker room.

“I honestly don’t even remember it,” Potomak said with a laugh when asked to describe her goal shortly after it sent the Gophers to the title game.

They return there in large part because of their senior goalie, Amanda Leveille, who made 37 saves in the 75-minute contest. Six of those saves came in overtime, where she helped the Gophers kill two penalties.

“Leveille made some big ones,” Frost said.

The Gophers got to overtime after trailing 2-1 entering the third period.

Amanda Kessel forced overtime with a goal on the first shift of the third period, tying the score 2-2. Her wrist shot from the slot snapped top shelf past Wisconsin’s Ann-Renee Desbiens, the best goaltender in the nation.

The tally gave Kessel 10 goals in 12 games following her February return from concussion symptoms that forced her to miss a year and a half.

“It means a lot to me,” Kessel said of the win. “I’m just really proud of our team. That win ranks up in my top-three wins. It was just unbelievable. It’s one of the best feelings I’ve ever had.”

The Badgers built a 2-1 lead late in the second period on a goal from first-line center Emily Clark. She buried a rebound bid past Leveille. That followed a first-period goal from Sophia Shaver, the only Minnesotan on Wisconsin’s roster. Shaver, who starred at Wayzata High and was a finalist last year for Minnesota’s Ms. Hockey Award, erased the early lead that the Gophers built. The freshman gathered a Sydney Baldwin turnover in Minnesota’s defensive zone and evened the score with a wrist shot.

Minnesota scored the game’s first goal just 2 minutes, 15 seconds in when Taylor Williamson of Edina buried a feed from captain Lee Stecklein, who had pinched below the net from her defensive position.

Williamson’s goal snapped a shutout streak of 302 minutes, 15 seconds for Desbiens, a stretch that dated to the Badgers’ 1-0 win over the Gophers two weeks ago in the WCHA championship game. The tally was the fifth goal in 37 games for Williamson, a freshman third line wing from Edina.

“Your big-time players in big games like this have to step up,” Frost said. “But there have to be unsung heroes too. And Taylor and Potomak … did that.”

Potomak is hardly an unknown forward on the Gophers, skating on the top line with co-captain Hannah Brandt and Kessel. But in a season of fine performances, her game-winning goal Friday stands out.

She intercepted a pass in Minnesota’s offensive zone and flipped the puck past Desbiens with a shot that emptied the Gophers’ bench, a group of players storming to celebrate a Frozen Four win with her.

“I just saw it go in the back of the net,” Frost said. “We were pretty happy about that.”