HALLANDALE BEACH, Fla. – The landscape of the south Florida racing circuit will change dramatically beginning Monday, when Gulfstream Park ushers in a new era and opens its 2013 summer meeting amid the turmoil of a dates conflict with neighboring Calder Race Course.

Lil Missknowitall has dominated her opposition in two starts at Assiniboia Downs, capturing the prep for the La Verendrye Stakes and the stakes itself by a combined 12 1/4 lengths.

Those wins at 5 1/2 and six furlongs were accomplished in front-running fashion, and on Monday, Lil Missknowitall will be trying a mile for the first time in the $30,000 Canada Day Stakes.

Lil Missknowitall will carry 123 pounds as she faces five rivals in the Canada Day, which goes as the seventh of eight races on a holiday Monday card that begins at 1:30 p.m. local time.

LOUISVILLE, Ky. – Eclipse Award winner Groupie Doll had her first workout of the year when breezing three furlongs early Saturday in 35.80 seconds over a fast Churchill Downs track.

Trainer Buff Bradley said he was very pleased with the move, which came with jockey John McKee in the saddle. Groupie Doll, the top female sprinter of 2012, eased back into training in early May after getting almost three months off at Bradley’s farm.

ETOBICOKE, Ontario – Pyrite Mountain and County Lineman, both trained by Mark Frostad, breezed six furlongs in 1:12.20 on the main track here Saturday in preparation for next Sunday’s $1 million Queen’s Plate.

Trainer Mark Casse sent out two of his Queen’s Plate hopefuls to work five furlongs on the main track, with Dynamic Sky clocked in 1:01 and Spring in the Air going in 1:00.80.

Pyrite Mountain and County Lineman worked in company, with Luis Contreras aboard Pyrite Mountain and apprentice Nick Webb on County Lineman.

ALTOONA, Iowa – Trainer Ron Moquett enjoyed a big Friday night as two of his horses, Gentlemen’s Bet and Livi Makenzie, won stakes races on opening night of Prairie Meadows’ two-card Iowa Festival of Racing.

Gentlemen’s Bet fended off a persistent challenge from North America’s top rated sprinted Delaunay to take the $125,000 Iowa Sprint Handicap by 1 3/4 lengths. Now 5 for 6 lifetime, the 4-year-old Half Ours colt, according to Moquett, “looked great this morning” and will return to Louisville.

INGLEWOOD, Calif. – Calidoscopio, the winner of the Breeders’ Cup Marathon at Santa Anita last November, emerged from his win in the Grade 2 Brooklyn Handicap at Belmont Park on June 7 with heat in a leg and has been retired, trainer Mike Puype said.

The 10-year-old Calidoscopio is expected to return to Argentina in coming months, Puype said. Calidoscopio began his career in Argentina before being sent to the United States last fall in advance of the BC Marathon.

Travel problems prevented jockey Robby Albarado from making it to Prairie Meadows in time to ride lightly raced 4-year-old Gentlemen’s Bet in Friday night's $125,000 Iowa Sprint. Albarado’s absence gave David Mello the opportunity to pick up the mount. Mello made the most of his chance by guiding Gentlemen’s Bet to victory over 1-5 favorite Delaunay.

Eleven months ago, Flashy American won her maiden while running for a $25,000 claiming tag. Friday night at Prairie Meadows, the much improved 4-year-old filly Flashy American was a dominant winner in a $100,000 Iowa Distaff.

Israel Ocampo had never ridden the filly Livi Makenzie before he was named as a late replacement for the absent Robby Albarado on Friday night at Prairie Meadows. But Ocampo was wise enough to change tactics, asking Livi Makenzie to stalk the pace rather than go to the front as she usually does in the $100,000 Saylorville Stakes for fillies and mares.

ETOBICOKE, Ontario - Trainer Brian Lynch can return to his barn at Woodbine on Saturday after the Ontario Racing Commission lifted a suspension that it had imposed while conducting its own investigation into an incident in a Woodbine parking lot on May 24.

Lynch allegedly had been involved in a confrontation with jockey Sunny Singh, and was arrested here the following day by Toronto police and charged with uttering death threats and unsafe operation of a motor vehicle.