Returning to the Tour de France after a doping ban, Alexandre Vinokourov of Kazakhstan won the 13th stage Saturday while Andy Schleck of Luxembourg kept the yellow jersey.

Vinokourov led a bold solo breakaway at the end and was followed in a mass sprint by Mark Cavendish of Britain and Alessandro Petacchi of Italy. They finished 13 seconds behind Vinokourov.

"It was a beautiful victory, a beautiful reward," Vinokourov said after winning a Tour stage for the fourth time in his career.

The 36-year-old rider won the Tour of Spain in 2006. He was kicked out of the 2007 Tour de France for blood doping in one of the biggest scandals of the doping-marred race that year.

Schleck kept pace with his closest challenger, two-time Tour champion Alberto Contador. The Spaniard trails the leader by 31 seconds.

Vinokourov looked back at the trailing pack and thrust his arms skyward at the end of the 122-mile course from Rodez to Revel over five low-level climbs in 4 hours, 26 minutes, 26 seconds. He hugged Contador, an Astana teammate, after the finish.

Vinokourov moved from the pack within the last 6 miles, overtaking an earlier breakaway rider, Italy's Alessandro Ballan. He then held off the pack on a late descent.

The top standings didn't change because the main contenders crossed in the same pack.

"It was a good day for my team," said Schleck, the Saxo Bank leader. "We didn't have to work. ... Today was calm — tomorrow is the battle. We're going to have a nice stage tomorrow."

Samuel Sanchez of Spain is third, 2:45 back.

Seven-time Tour champion Lance Armstrong cruised in a late-arriving bunch. He finished 4:35 back in 100th place, the fourth straight day he's lost time to the leader. The 38-year-old American has said his victory hopes are finished. He's 36th overall, 25:38 back.

The race enters the Pyrenees on Sunday — the first of four days of punishing climbs in the mountains that will play a key role in who wins the three-week race at the July 25 finish in Paris.

The 115-mile ride from Revel to the ski station of Ax-3 Domaines will lead riders up two extreme climbs, first the Port de Pailheres — one of the toughest ascents in cycling — and an uphill finish.