06/13/2006 12:00AM

Certain Harmony tries route

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ETOBICOKE, Ontario - After sprinting in her first five starts, Certain Harmony will experiment at 1 1/16 miles on Thursday at Woodbine in the finale of an eight-race card, an Ontario-sired allowance for fillies and mares.

Certain Harmony, trained by Mike Doyle for Hendrie Stable, showed a modicum of potential in her 2-year-old campaign, making three starts and placing in two Ontario-sired maiden dashes.

In her April 21 season opener, Certain Harmony closed mildly after being bumped at the break and finished fifth in a 12-horse field. Most recently, she made her first start with Lasix and improved significantly, winning a seven-furlong maiden special by a neck. She earned a Beyer Speed Figure of 66.

Certain Harmony, a daughter of Ascot Knight, is out of a mare who has produced three route winners from five starters. Her full brother Cheery Knight won two 1 1/16-mile stakes, the Elgin and the Marine, and was second in the 1993 Queen's Plate.

Slade Callaghan, who will ride Certain Harmony, has a solid record at the meeting when he rides for Doyle. They teamed to take a recent maiden special with Stormkick, a Hendrie-owned prospect for the June 25 Plate.

Among the others entered in the 11-horse field are Curve of the Moon, Box Office Launch, and Cherry Grove.

Curve of the Moon defeated $32,000 maidens going long second time out at 2. She then finished fifth in the restricted South Ocean Stakes. After a winter break, she finished third and fourth in a pair of Ontario-sired allowances in May.

Woodbine's leading rider, apprentice Emma Wilson, rides.

Box Office Launch defeated $50,000 maidens around two turns in November and then capped her campaign by running second to Questuary in an allowance. Following a winter layoff, she was second to next-out winner Executive Flight in an allowance sprint April 21 and is coming off a sixth-place finish over a speed-favoring track in the seven-furlong Lady Angela Stakes on May 27.

Cherry Grove's lone victory in 15 starts came in a mile-and-70-yard event in August 2005. In her lone outing this year, Cherry Grove was eighth in a key allowance won by London Snow, who came back to capture the restricted Lady Angela.