San Francisco- Fueled by several slices of pizza, a 7-year-old boy braved the chilly waters of San Francisco Bay on Monday and became one of the youngest swimmers to cross the channel from Alcatraz Island to the city.

Braxton Bilbrey, a second-grader from Glendale, Ariz., made the estimated 1.4-mile swim to San Francisco’s Aquatic Park in 47 minutes, his coach said. No official records are kept, but Braxton could be the youngest ever to accomplish the feat.

“I think it’s pretty cool,” the wetsuit-clad boy said shortly after his father grabbed him under the arms and lifted him from the water, estimated in the mid-50 degrees.

Braxton, who said his next ambition is to swim the English Channel, swam freestyle, his favorite stroke, the whole way.

He said he ate pizza for dinner Sunday and was helped along by shouts of encouragement from his coach, Joe Zemaitis, and two other adults who swam alongside him. The toughest part, Braxton said, was the chilly water.

He was greeted at the beach by a throng of reporters, photographers, family members and other well-wishers.

Zemaitis, who has completed the Escape From Alcatraz Triathlon seven times, said the fast crossing was partly due to flat water and good tides. San Francisco Bay is known for its strong currents and rough waters that are usually churned up by winds that roar through the Golden Gate.

“He did great,” said his father, Steve. “He looked so strong. He did so awesome. I’m so proud of him.”

Braxton’s mother, Stacey, wasn’t originally sold on the idea of the swim, but said she accepted it once her son proved his dedication, training two hours a day, four times a week.

“Any time a 7-year-old has that strong of a desire, as long as it’s a good desire, you should support it,” she said. “He’s worked hard for it.”

Alcatraz, once a notorious federal prison that housed some of the nation’s infamous criminals, including Chicago mobster Al Capone, is now a tourist site that attracts about 1 million visitors a year. It also draws a fair share of swimmers who attempt the crossing as part of the annual triathlon.

The Arizona boy got the idea when he saw a magazine story about a 9-year-old boy who made the swim. Johnny Wilson, a fourth-grader from Hillsborough, Calif., completed the swim in October in under two hours.

Zemaitis said Braxton was going to get something to eat and then take it easy. “He’s going to rest up,” he said. “He’s had a big day.”