updated 5:45 p.m. ET July 16, 2005

COURCHEVEL, France - Two faces. One was Lance Armstrong’s, steely but almost serene as he pedaled furiously in the thin mountain air. The other was a mask of pain worn by Jan Ullrich, his great German rival trailing farther and farther behind.

Armstrong took a giant step toward a seventh consecutive Tour de France victory with a dominant ride Tuesday on the first Alpine climb of this year’s race, retaking the overall lead — which he could hold all the way to the finish in Paris on July 24.

At the top of the snaking, crowd-lined final climb to the ski station of Courchevel, the American was beaten to the line by Spanish rider Alejandro Valverde, a 25-year-old who Armstrong says could be the next big thing in cycling after he retires at the end of this Tour.

But the second-place finish was just fine. Riders Armstrong regards as his main threats, including Ullrich, were way behind, still laboring as he and Valverde clasped hands in the saddle in mutual recognition.

They covered the 111-mile 10th stage in 4 hours, 50 minutes, 35 seconds. Because of a protest at the start by farmers angry over wolf attacks on their sheep and cows, organizers shortened the race by more than 9 miles, beginning it after the town of Froges, near the city of Grenoble.

Mickael Rasmussen crossed the finish line third and Spain’s Francisco Mancebo was fourth, both 9 seconds back. Along with Valverde, they were the only riders who managed to stay with Armstrong on the final ascent.

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The ride silenced doubts that Armstrong is too old at 33, or too jaded after his record six victories, to win again. If he follows the pattern of previous Tours, he might not relinquish the leader’s yellow jersey that he already wore for five days last week.

“Today, I had good legs,” Armstrong said. “We are in a good position with regard to some of the main rivals, so we’ll have to protect that and that might mean protecting the jersey and hopefully retiring in it. But we’ll see, there’s still a lot of racing to go.”

Overall, Armstrong leads Rasmussen by 38 seconds. While he does not regard himself as a challenger to Armstrong, the Dane has shown himself enough of a threat on climbs — he won the ninth stage with a gutsy solo ride over six ascents — to warrant the Texan’s attention.

“He’s a damn good climber and we have to watch him now,” Armstrong said.

Italian Ivan Basso, among the challengers left behind by Armstrong on the 13.8-mile final ascent, was 1:02 behind in fifth place Tuesday — his overall deficit to Armstrong growing to 2:40.

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