NORTHBORO — Some of the best softball sluggers and pitchers in Massachusetts came together on Saturday at the New England Baseball Complex for a worthy cause: the A Shot For Life Home Run Derby and pitcher’s challenge.

And a long day’s journey into night culminated with a dramatic final moment in the Home Run Derby.

Former Somerset-Berkley and current Tabor Academy star Bella Nugent hit the ultimate walk-off as she homered on the final swing of the night to take the crown off the head of Attleboro’s Lola Ronayne following a 25-homer effort in the finals.

“That was awesome,” Nugent said. “It was a great way to end it. This is a great. My brother (Joe) did this for a couple of years in basketball and I’m happy to be a part of it.”

Ronayne was the top seed after the opening round and advanced past No. 8 seed Isabel Moreno, 9-8, to get her spot in the four-batter swing off.

Joining her was another Lola in Lola Grube of Uxbridge along with Bedford’s Alyx Rossi.

Ronayne was first in the box for the finals and she got red hot in the middle of her round to finish with 24.

Grubs followed with a 15 homer at bat and Rossi then cranked 11, leaving the stage to Nugent.

And it looked like she was going to come up short as she only had 11 at her timeout. But she got scorching hot in the final moments, capped by her decisive last swing.

The pitching competition, fittingly, had to come down to a tiebreaker between Franklin’s Sophia Sacramone and former Central Catholic and current Londonderry (N.H.) ace Liz Kearney.

Deadlocked at a total of 12 points after three events, the two squared off in a one frame bowl off with Kearney’s spare giving her the decisive margin.

“I am so excited that (ASFL head) Mike Slonina gave me this opportunity,” Kearney said. “It’s so special to come out here and support cancer research.”

Kearney and Sacramone were contenders for the top spot all afternoon.

They tied for second behind East Bridgewater’s Maggie Schlossberg in the nine-hole pitching accuracy challenge. And then repeated the same in the range finder challenge that saw each pitcher try to hit the target from four progressively longer distances. Nugent won the event, hitting on four of her five tosses.

A bowling competition that saw each pitcher get five regulation frames was the final event.

Entering it, Kearney and Sacramone were tied for first. Walpole’s Sharlotte Stazinski and Triton’s Emma Penniman also were in with a chance to win.

Saint Paul’s Bella Mara easily won the completion with a stellar score of 58 pins. Stazinski finished fifth and missed only the playoff by two points. Kearney and Sacramone tied for fifth, setting the stage for the bowl-off.

“It got really competitive but also it was great to share this experience with everyone,” Kearney said.