LONDON — Allyson Felix earned a second gold medal on Sunday and highlighted an overwhelming performance by the United States at the 10-day track and field world championships.

In doing so, Felix became the most decorated athlete in the history of the event – and that includes Usain Bolt.

Felix and her teammates won gold in the 1,600-meter relay a day after she won the same color medal in the 400 relay. She also earned a bronze medal in the individual 400 meter and now has 16 career medals at the world championships. Bolt finished his career with 14.

“It’s an honor to run in the relay for Team USA,” said Felix, who won her first medals at the 2005 worlds in Helsinki.

In a world championship of upsets right up to the last event, Trinidad and Tobago beat the United States in the men’s 1,600 relay, producing only a little dent in an all-powerful performance.

The Americans finished with 30 medals, 10 of them gold. That was only one short of the overall record held by East Germany.

Bolt, however, will leave London without a gold medal. Running at his last major championship this week, the Jamaican got a royal farewell from the 60,000 fans at Olympic Stadium on Sunday as they cheered his famed “To The World” pose.

“It was brilliant,” said Bolt, who pulled up in his last race as he was running the anchor leg Saturday in the 400 relay. “Everything happens for a reason.”

Kenya was the only other team to break into double figures with 11 medals overall.

The African nation got two more golds on the final day, with Hellen Obiri winning the 5,000 and Elijah Manangoi leading a 1-2 Kenyan finish in the men’s 1,500.

Bolt gave Jamaica gold medals and chutzpah for a decade, but his farewell meet only produced a bronze in the 100 meters. Jamaica slumped to four medals this year, compared to 12 only two years ago.

The meet got its only world record Sunday, and it was in the only new event – the women’s 50-kilometer walk.

Ines Henriques of Portugal bettered her own mark by finishing in 4 hours, 5 minutes, 56 seconds on the two-kilometer loop in central London. Only seven women started the race and only four finished.

On the track, the most overwhelming performance came from the U.S. women. They won the 1,600 relay by about 50 meters.

Besides Felix, 400 champion Phyllis Francis also won a second gold medal.