Full Serrano became the sixth Argentine-bred to win a Breeders’ Cup race when he turned back late challenges in Saturday’s $920,000 Dirt Mile (G1) at Del Mar.

The Hollywood Gold Cup (G2) was the featured dirt race on Santa Anita’s Memorial Day card, but an earlier maiden captured the imagination.

Michael Lund Petersen’s Kinza and Santa Ynez (G3) winner Kopion brought similar profiles into Saturday’s Las Virgenes (G3).

A four-month layoff didn’t stop 11-10 favorite Didia from posting a comfortable victory in Saturday’s Rodeo Drive (G2) racing 1 1/4 miles over the Santa Anita turf course.

Michael Lund Petersen’s Adare Manor appeared to have a straightforward task on paper in Sunday’s Zenyatta (G2) at Santa Anita, and the 1-10 favorite ensured that there would be no suspense.

When Kirstenbosch nipped 8-5 favorite Ganadora at the wire in Sunday’s La Canada (G3), she scored a new career high for herself as well as a memorable victory for jockey Kazushi Kimura.

Just as Flightline’s conquest of the Breeders’ Cup Classic (G1) had an air of virtual inevitability about it, so did the announcement of his retirement to stud in the aftermath.

Speed Boat Beach, champion Ce Ce, up-and-coming Midnight Memories, and dirt marathoner Heywoods Beach won stakes at Santa Anita Sunday.

Sunday’s Rancho Bernardo H. (G3) was a virtual match race between defending champion Edgeway and prime challenger Slammed, both in the betting and on the racetrack.

At Del Mar on Sunday, Heywoods Beach dethroned 9-10 favorite Tizamagician in the Cougar II (G3), and Irideo pulled a $65 upset in the Wickerr S. after the big scratch of Smooth Like Strait.

Shipping outside of California for the first time, Flightline lit up Belmont Park with an eye-popping performance in Saturday’s $1 million Metropolitan H.

American Theorem nipped an ultra-game Principe Carlo in the Triple Bend (G2), as the 3-10 favorite Brickyard Ride faded at Santa Anita.

Sunday’s $301,000 Malibu (G1) was supposed to present Flightline with a class test, but the unbeaten colt was a class apart from the opposition at Santa Anita.

Grace Adler dominated the Del Mar Debutante (G1), longshot Liam’s Dove broke her maiden in the Del Mar Juvenile Fillies Turf, and unbeaten sophomore Flightline also grabbed attention on the Sunday card.

The Kentucky Derby (G1) picture on the West Coast experienced a seismic shift Saturday, as unbeaten turf performer Rock Your World seamlessly transferred his game to dirt in the $752,000 Santa Anita Derby (G1).