But Reyna, a married mother of two who works as a Social Security Administration lawyer, never really took her eyes off her goal of one day running a full marathon like Sunday's 26-mile race.
Beginning this Sunday morning at Huntington Beach, starting at approximately 6:30 a.m., Reyna looks to complete that long-term goal, in the Surf City USA Marathon. The beautiful oceanfront course is a qualifier for the Boston Marathon, set for April 16. Reyna's goal for her time is 3 hours, 55 minutes or faster, which would qualify her for Boston.
"If the planets align, I'll be able to run under four hours," Reyna said. "My orthopedic surgeon back then said, 'You might never run again'. He said I'd be lucky to do a 12-minute mile … I went on for three years, I'd run a little for two or three miles before my knee would hurt."
About three years ago, a group of mothers that Reyna was a part of got her into triathlons — the swimming and cycling helped, and eventually she got her running legs back. Reyna began to run 5-kilometer and 10K races in September 2010.
Reyna's most recent half-marathon was in November at the Big Sur Marathon in Monterey, where she ran a pretty respectable time of 1:57.21, which was among the top half of the final times.
"I'm kind of obsessing over it," Reyna said of running the Surf City Marathon. "I'm so happy I'm able to run it."
Reyna credited Carolyn Grabiel, her friend who has run in more than 15 marathons, with pushing her in her training for this marathon. Reyna has aimed to run at a nine-minute, 20-second pace for 16 miles, following the Hanson-Brooks distance project.
"If I do well at all, it's because of her," Reyna said. "She's been getting me up at 5:30 a.m. It's all felt pretty good. I don't think the knee has held me back."
As for Sunday, Reyna is anticipating an emotional comeback.
"I've played it through my head several times," Reyna said. "I've run half-marathons before. I feel it's twice as exhausting. I feel I might cry. I might pass out. I feel like every race has been my best."
A great comeback story has a great chance at making Sunday even better.