Alyssa Parker capped her storybook high school field hockey career with one more signature highlight.

Late in the first half of the Maryland 2A final against Poolesville on Saturday, the Glenelg senior midfielder took possession well behind the midfield stripe, dribbled about 70 yards through at least five Falcons defenders, and scored an unassisted goal that gave the top-ranked Gladiators a two-goal lead.

“[Senior midfielder] Mary Kate [Olson] said: ‘You’re good. Go,’ so I just kept going,” said Parker, a Maryland recruit. “The opportunity just presented itself. You do what you gotta do for the team.”

Parker finished with a goal and an assist, and senior forward Meagan Guthrie scored twice to lead Glenelg to its second straight state title with a 3-0 win over Poolesville (13-2) at Washington College.

The Gladiators (18-1), who have been ranked No. 1 in The Post’s Top 10 all season, outscored their opponents 152-8 this year, and Parker finished her career with 114 goals and 108 assists.

“This is an extremely special group,” Glenelg Coach Ginger Kincaid said. “It’s bittersweet today because I have a group of kids that is a once-in-a-lifetime group that I have ushered this far. I really hate to let them go.”

Glenelg outshot Poolesville 20-2 and earned 17 penalty corners to the Falcons’ three, but Poolesville senior goalkeeper Amy Defnet made 17 saves and almost single-handedly kept the game close.

Defnet made 14 saves in the second half, including one on a well-placed penalty stroke and another when she came out of her cage to stop Parker on a breakaway.

“I was just trying to do everything I could to stop the ball,” Defnet said. “Unfortunately, it wasn’t enough, but it was still a really good game.”

Guthrie opened the scoring with a shot from the goal mouth after a pass from senior forward Meghan Milani less than eight minutes into the game, and Guthrie later iced the win on a similar play after a pass from Parker with four minutes left in the second half.

“We worked so hard at this and we all wanted this so bad,” Guthrie said. “Our whole season has been just for this game.”