Mustaqeem Williams collapsed across the finish line of the 200 meters at the Virginia AAA track & field championships, tumbling to the track with cramps in his legs and his hands over his face.

It was about the only time all weekend the Forest Park junior looked human.

He had just finished in 20.97 seconds against a 1.6 headwind, beating a nine-year-old meet record by 0.16 to capture his third individual championship of the weekend and put the finishing touches on the Bruins’ second Virginia AAA track & field state title of the year with 68 points at Todd Stadium.

“Good thing that was my last event,” he said. “[I’d] been having cramps since the 100. I didn’t really let it faze me. I wanted to go out there and win, and that’s what I did.”

Williams also captured the 100 (10.52) on Saturday, in addition to winning Friday’s long jump (24 feet, 6.75 inches) and setting a new state meet record in the 4x100-meter relay (41.08) with teammates Ricky Morgan, Joshua Washington and Elijah Newsom.

Western Branch (45) and Oscar Smith (30) finished second and third in the team standings.

Suddenly, a school with no boys’ state championships in any sport entering the 2012-13 campaign has two — and a burgeoning track legacy to boot.

“It means a whole lot to me,” Williams said. “This moment is never going to be forgotten. I am really honored to be a part of that program.”

Williams’s only blip was finishing second in the triple jump (48-11.75) behind new state record holder Aaron Worrell of Woodside, who leaped a stunning 51-5.

Morgan placed second in the 400 (47.04) behind Oscar Smith’s Michael Cherry(46.02), and Washington (21.96) and Morgan (22.14) added five points in the 200, in which the Bruins had three of the eight finalists.

The South County girls were propelled to their second state title of the year as well with 50 points, 45 of which came from standout Felecia Majors on a weekend she said, without a trace of irony, “hadn’t gone exactly the way I wanted it to go” entering the 400.

Yet the senior who often talks about her inner monologues gave herself a pep talk with multiple runner-up finishes entering her second-to-last event.

“Well, I really did not know going into [the 400],” she said. “I had to stay strong and [say], ‘This is your race.”

She set a new personal best at 53.65 and ensured she would not leave her final high school meet with no golds. Majors finished second in the pole vault (11-9), long jump (19-4.5) and 200 (24.54), third in the triple jump (38-8) and fourth in the 100 (12.04) while not placing in the high jump.

“I’m kind of relieved, but I’m sad at the same time,” she said. “I’m glad that I don’t have to ever do seven events probably ever again, but I’m kind of sad because it’s my last time at South County.”

Morgan Knight’s fourth-place showing in the 100 hurdles (14.74) supplied the rest of the points for the Stallions, who were followed by Western Branch (37) and Osbourn Park and Great Bridge (28).

Chantilly’s Sean McGorty took care of business in the 3,200 in the morning, winning easily in 8:58.07, and Robinson’s Macey Schweikert blew away the field in the 1,600 at 4:51.15.

Westfield’s Nathan Kiley capped his career with an 800 title (1:51.80), and Battlefield’s Ellison Grove (2:12.04) won the girls’ 800. Also, the Woodbridge girls’ 4x400 of Diane Buckley, Kady Badham, Jewel Christian and Farrah Suber set a state record in 3:43.39.

Hylton’s Ebony Owusu-Sampah (38-8.5) won the triple jump, and the boys’ pole vault ended with Lucas Wratschko of Oakton outdueling top-seeded Logan Besougloff of Langley to win at 14-6 in a tiebreaker.