11/08/2007 1:00AM

Bit of Whimsy going for one more

Michael J. Marten/Horsephotos
Bit of Whimsy surges to win the Queen Elizabeth II Challenge Cup.
LOUISVILLE, Ky. - Bit of Whimsy already got the cake when capturing what trainer Barclay Tagg called the ultimate goal of the year for her: the Grade 1 Queen Elizabeth II Challenge Cup on Oct. 13 at Keeneland.

Now comes the icing, if only she can run that fast again. Bit of Whimsy, with Javier Castellano to ride, will break from post 3 on Saturday in an extremely tough renewal of the $150,000 Mrs. Revere Stakes, a Grade 2 race that marks one of the final lucrative opportunities of the year for 3-year-old turf fillies.

Generally, a QEII winner would figure as a prohibitive choice when making her next start in a race like the Mrs. Revere. But as part of a field with remarkable depth - the full gate of 14 includes nine stakes winners - Bit of Whimsy should be a clear-cut favorite, but not a heavy one.

If she performs like she did at Keeneland, she will reward her backers. After rating kindly toward the back of the pack, Bit of Whimsy fired the most powerful shot of her six-race career, surging past front-running Dreaming of Anna to win going away.

Two QEII also-rans, Touch My Soul and Costume, will return Saturday for another crack. As for the others, Bel Air Beauty will be taking what trainer Frank Brothers called "a huge step up" after winning the Grade 3 Valley View last out at Keeneland with a sweeping rally.

"It's taken all year for her to kind of get her act together after having a few bumps in the road," Brothers said. "I do like the way she comes into this."

Bel Air Beauty may have an intangible factor in her favor: She is the final career mount for Mark Guidry, who is retiring after an outstanding 32-year riding career.

Other contenders in the 1 1/16-mile race include Tensas Yucatan, winner of the DeBartolo Oaks last out; Ciao, a Chicago invader with two wins in as many tries over the Churchill course; Gotta Have Her, winner of a small Santa Anita stakes last out and the lone California shipper in the group; and Cat Charmer, winner of the Pebbles at Belmont Park last month for trainer Graham Motion.

The Mrs. Revere, named for the Bill Mott-trained filly who was a Churchill standout in the mid-1980s, is the penultimate graded race in the division this year. The Grade 3 Frances Genter on Dec. 29 at Calder is the last one.