Worley is 13th in the World Cup standings and fifth in the giant slalom rankings.
The giant slalom features fewer gates, making it a faster race over a longer course.
It left him top of the giant slalom standings ahead of overall World Cup leader Marcel Hirscher.
It was Fenninger's second win of the season having won the giant slalom in Semmering, Austria, in December.
The 25-year-old suffered concussion and could be a doubt for next week's giant slalom and slalom in Adelboden, Switzerland.
Sunday also sees the last race of the women's season, a giant slalom.
Maze has already secured the overall and giant slalom titles and now leads in the slalom and the super-G disciplines.
The women's giant slalom title had already been decided before the final race, Italy's Denise Karbon claiming the crystal globe.
It was a good day for American skiers, with Ted Ligety triumphing in the men's giant slalom in Adelboden, Switzerland.
At the rate we're losing temperature, Salt Lake City may want to relocate the giant slalom to Nob Hill next winter.
"I'll need for some time to be able to take this in, " Shiffrin, who did not finish Wednesday's giant slalom, told reporters.
Maze still clinched her third giant slalom discipline title by placing second.
The full name for the race is the super giant slalom and it was first included in the 1988 Winter Olympics in Calgary.
Ligety, who claimed the giant slalom title in Schladming, was only fifth going into the second leg and could not make up the deficit.
For his second gold in the giant slalom in Sierra Nevada he made up 0.81 seconds on the first-leg leader to top the podium.
Ligety will get a chance for a hat-trick of golds in Friday's giant slalom -- he won the title in 2011 in that discipline.
Politicians' ritual slanging matches should not be allowed to distract Canadians from weightier battles, such as the bobsleigh, the giant slalom or round-robin curling.
Maze also won the super-G gold at the recent world championships in Schladming in Austria and claimed two silvers in the super-combined and giant slalom.
Ruiz-Castillo claimed her maiden win, and only her second podium placing -- some 13 years after her first in a giant slalom in Sestriere, Italy.
CNN: Innerhofer equals record as Austrians make skiing history
Finland's Tanja Poutianen finished fourth while Slovakia's Tina Maze -- who took gold in the Super-G and silver in the Giant Slalom -- finished fifth.
He was crowned 2003-4 champion on Saturday when a giant slalom at the World Cup finals in Sestrieres in Italy was cancelled because of fog.
The American had the consolation of securing the giant slalom crown.
Ligety, who had won gold in the Super-G, super-combined and giant slalom, was the first man to achieve such a feat since Claude Killy in 1968.
Nagano hosted the Winter Olympics in 1998 and a point of pride for Mr. Usui is that he skied a course used for the giant slalom.
The first run of the giant slalom was completed on Saturday and saw Bode Miller fall, meaning he too could not catch the Austrian in the standings.
France are currently lying second with two golds -- Marion Rolland in the Downhill and Tessa Worley in the Giant Slalom -- one silver and one bronze.
Meanwhile, Austria's Marcel Hirscher increased his advantage in the battle for the men's overall World Cup title with second place in the giant slalom at Garmisch-Partenkirchen in Germany.
"It becomes easier to reach a higher level when you already have a road map to get there, " said Ligety, who is the defending World Cup giant slalom champion.
But 2011 saw Ligety claim his first world title, winning the giant slalom at Garmisch and then going on to clinch his third World Cup crown in his favored discipline.
It's amazing because Janica has never been on the podium of a World Cup giant slalom and, on paper, Nef was the favourite, mainly because she was so dominant last season.
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