She was also a state cross country champ last fall, with her time of 18:28 setting the Hereford High School course, Class 2A, and overall state records. Oneda outpaced the rest of the 2A field by nearly a minute and a half.
In November, she was named the Gatorade/ESPN Maryland Girls' Cross Country Runner of the Year.
"She always did more than she was required to do," said Kelly Gruber, Oneda's cross country coach at Winters Mill. "She didn't need much motivation. And when Hannah finished her race, she always came back to cheer her teammates on."
Oneda didn't win any of her nine championships by a step or two. She usually obliterated the competition. She took her first two state titles at the 2011 indoor state meet, winning the 1,600 in 5:07.35 and following with a 10:54.09 at 3,200 meters.
She repeated her championship double at the 2011 outdoor meet, winning the 1,600 in 5:12.96 and taking the 3,200 with a time of 11:13.65.
In her final indoor state meet last February, Oneda set Class 2A state records in both events. She beat Tiffany Lang of Oakland Mills in the 1,600 by over 20 seconds, and blitzed the field in the 3,200. Her time of 10:45.67 was a full 45 seconds better than runner-up Emily Ruppel of Loch Raven — the only runner to finish within a minute of Oneda.
Oneda continued the onslaught in her last outdoor state championship, last month at Morgan State's Hughes Stadium. With a time of 5:03.96, she took the 1,600 title by nine seconds over Poolesville's Chelsie Pennello. But her best performance came in the 3,200, where she bested Glenelg's Julia Nardone by 25 seconds. Her time of 10:52.01 shattered the Class 2A state record set by Atholton's Carolyn Forde in 1982.
Oneda nearly pulled off a rare trifecta at her final meet. She finished fifth in the 800 meters, just three seconds behind winner Caitlyn Boyles of Largo.
"The goals that I set for myself are faster than the records," Oneda said. "If I get the records, that's fine. I don't think (the magnitude of) it will ever really hit me, because I was running and not thinking about setting history forever. I just wanted to challenge myself."
Her coach at Winters Mill, Stan Jones, doesn't think he will ever see a runner like Oneda again.
"She's an anomaly," Jones said. "Hannah had one speed: go. She never took it easy. There often was no one for her to run with, so she had to race against herself. What I saw in Hannah was a great work ethic. She was the last person at practice every day."
Her running achievements might have been helped by a unique pair of shoes that don't in any way resemble what most runners wear.
"My friend Amber Slater and I read the book "Born to Run" when I was finishing up my sophomore year," said Oneda, the daughter of Siniti and Victoria Oneda and younger sister of 2010 Winters Mill graduate Koya. "The book explored the theory that people were born to run, and that's why we became upright and have certain muscles, tendons and ligaments where they are in our bodies that turn us into natural distance runners.
"The book mentioned these crazy-looking shoes called Vibram Five Fingers. We bought them, and I totally walked right into them. From there, my feet adjusted and I haven't changed. I can barely wear tennis shoes any more."
Oneda was also unique in the classroom. A straight-A student, Oneda challenged herself with 17 Honors and seven Advanced Placement classes. Headed for Johns Hopkins, she finished high school with a 4.4091 weighted grade point average.
"I recognize her as the ultimate student-athlete," said Winters Mill athletic director Stephen Speck. "Not only is Hannah an exemplary athlete, but she is also a true scholar."
Oneda seems to be as competitive in the classroom as she is on the course.
"I'm a raging perfectionist, and I have to do everything right," she said, chuckling at her self-characterization. "I would have taken more AP classes in my senior year, but my dad wouldn't let me. He said I'd taken enough and he wanted me to back off, after considering that I'd come home from practice in my junior year and spend four hours every night and most of the weekends doing homework."
Oneda's running and academic schedules didn't keep her from taking a role in her school and community. She accumulated more than 120 community service hours. On many Thursday nights, Oneda could be found working in a Westminster-area soup kitchen. She also makes meals for the Glenelg-based Eagle Voice Center, which helps the homeless in Howard County.
A member of the National Honor Society, Oneda worked with senior citizens at Carroll Lutheran Village and helped with holiday parties for kids at Cranberry Station Elementary.