But she kept her patience throughout, got to play with Annika Sorenstam and got invited back for next year.
Song wrapped up her day on the leaderboard with a birdie on the final hole for a 1-over 285.
She was the low amateur, and only two strokes off leaders Hilary Lunke, Angela Stanford and Kelly Robbins, who will meet in a playoff round on Monday.
'That was fun,' Song said.
Song, 17, just graduated from high school in Bradenton, Fla., with her twin sister Naree, who also played at Pumpkin Ridge but didn't make the cut. Both will be freshmen at Florida in the fall.
Formerly known by the last name Wongluekiet, the Thai twins were among 14 teenagers who qualified for the Open.
Seven of them made the cut, headlined by long-driving 13-year-old Michelle Wie, who was dogged by controversy.
Wie, who became the youngest player to win a USGA title for adults at the U.S. Women's Amateur Public Links two weeks ago, finished well off pace at 298, but birdied her final hole to the roar of her large gallery.
Her father and caddie, B.J. Wie, had claimed that LPGA Tour pro Danielle Ammaccapane pushed his daughter during the first round then berated her in the scoring tent for a breach of etiquette.
B.J. Wie corrected his statements on Saturday, saying no physical contact was made.
Michelle Wie was then caddied by her hitting coach, Gary Gilchrist, for Sunday's final round.
Irene Cho, 18, who will begin her sophomore season at Southern California in the fall, left the 18th hole in tears, finishing with a 23-over 308.
Jane Park, 16, of Oak Valley, Calif., finished with a 12-over 296, as did 19-year-old Elizabeth Janangelo, who is headed to Duke this fall as a freshman.
Christina Kim, who at 19 is a rookie on the LPGA Tour, finished with a 10-over 294.
Two years ago, then-12-year-old Morgan Pressel became the youngest qualifier in U.S. Women's Open history and attracted large crowds at Pine Needles. She was back this year at 15, winding up with a 20-over 304.
The youngest girl to play in this year's Open, 13-year old Sydney Burlison, did not make the cut. Burlison was born nine days after Wie.
I'LL BE BACK
Juli Inkster fell short in her effort to win a second consecutive U.S. Women's Open and become the oldest-ever winner.
Last year at Prairie Dunes in Hutchinson, Kan., Inkster became the second-oldest to win the title, at 42 a year younger than Babe Zaharias when she won it in 1954.
At next year's Open, Inkster will be 44, so she'll get another shot.
'I've got the game,' she said. 'It's just a matter of getting the breaks.'
Inkster finished with a 3-over 287, four strokes off the lead. She bogeyed the final hole, which also gave her trouble in 1997 when the U.S. Women's Open was first held at Pumpkin Ridge.
'I played good today,' Inkster said. 'I just hit a couple of bad clubs -- which is easy to do out here.'
Asked what she planned to do after playing in her first U.S. Women's Open, Wie said she was returning to life as a teenager. 'I'm going shopping,' she said. ... Grace Park had the lowest final round with a 3-under 68. ... Sorenstam was understandably unhappy with her final round, finishing with a surprising bogey on the final hole for an even-par 284. She ended one stroke off the leaders. 'I'll change my batteries, I'll be ready when I need to,' she said. 'But right now I feel like being grumpy.'
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