LONDON -- San Francisco's Shannon Rowbury was among three Americans who advanced into the semifinals of the women's 1,500-meter run at the Olympics on Monday morning.

Rowbury, a 27-year-old, two-time Olympian, running in the fastest prelim heat, finished seventh but qualified with a time of 4 minutes, 6.03 seconds. She was the fastest of the non-automatic qualifiers into the semifinals.

"We ended up going out really quick. I tried my best to tuck in and conserve energy," Rowbury said. "I didn't quite close soon enough. I'll hopefully learn from that and change it in the semifinal. I'm really been working on closing."

Reigning World Champion Jenny Simpson ran in the slowest heat of the day and was in the 10th position with half a lap remaining, but steadily kicked her way up through the crowd to claim the final automatic qualifying spot by five hundredths of a second in 4:13.81.

"If people want to see my miracle kick, that was definitely a miracle today. I ran the slowest race to make it in," Simpson said. "At this point, what's done is done, I have to move on. It was really physical up front. With about 200 meters to go I realized I needed to do something so I put my head down and didn't look up until 5 meters to the line. I think it's the first time in my life I've leaned at the line."

American Morgan Uceny (Mammoth Lakes, Calif.) finished second in her hear to qualify in 4:06.87.

"I felt good," she said. "I was a little anxious because I haven't raced a lot. There's nothing better to prepare you than to do three rounds. I didn't it once, I can do it again."