Lauren Phinney arrived with her red and matching red dress on opening day at Del Mar Thoroughbred Club. (Nelvin C. Cepeda / San Diego Union-Tribune)
Tatiana Slepova volunteered at the hat competition on opening day at the Del Mar Thoroughbred Club. (Nelvin C. Cepeda / San Diego Union-Tribune)
Joshua Harris from East Village sported a summer fedora hat for opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Maddy Tran from San Marcos arrived on opening day of Del Mar Thoroughbred Club dressed with her favorite hat. (Nelvin C. Cepeda / San Diego Union-Tribune)
Caroline Sullivan on opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Shelli Swindell from Solana Beach work a straw hat for opening day at the Del Mar Thoroughbred Club. (Nelvin C. Cepeda / San Diego Union-Tribune)
Melissa Berry from downtown, San Diego wore a red layered hat for opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Gianne Wointwood and Laura Paulson on opening day at the Del Mar Thoroughbred Club. (Nelvin C. Cepeda / San Diego Union-Tribune)
Azucena Hierro wore hat filled with bright yellow flowers for opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Sonya Alexander from La Mesa dressed in black to match her black net hat for the hat competition on opening day at the Del Mar Thoroughbred Club. (Nelvin C. Cepeda / San Diego Union-Tribune)
Joe Little from Chula Vista wore fedora hat for opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Julie Turner on opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Samantha D. Wolf from downtown, San Diego on opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Janessa Francisco on opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Liticia Arguelles from Escondido wore a black hat and a white dress for opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Najma Ali from Mission Valley wore a large white net hat for opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Brenna Arant from Carlsbad at opening day in Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Allie Wagner with KUSI-TV on opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Lupe Ahern wore a large hat too opening day for the traditional hat competition at the Del Mar Thoroughbred Club on opening day. (Nelvin C. Cepeda / San Diego Union-Tribune)
Shelli Swindell from Solana Beach work a straw hat for opening day at the Del Mar Thoroughbred Club. (Nelvin C. Cepeda / San Diego Union-Tribune)
Victoria Sexsmith from Menifee, California on opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Bianca Wilson wore a hat made of butterflies for opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Sisters Anna Mackin and Debra Mauzy-Melitz on opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Amanda Haren from Ocean Beach on opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Jennifer Zamudio wore a black hat and white dress for opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Audra Stafford stopped by to model her opening day hat at the Del Mar Thoroughbred Club. (Nelvin C. Cepeda / San Diego Union-Tribune)
Christina Jones from Murrieta arrived wearing a red ribbon hat for the hat competition on opening day at Del Mar Thoroughbred Club. (Nelvin C. Cepeda / San Diego Union-Tribune)
Carlos Amezcua at opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Laurie Perchak on opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
At opening day at Del Mar, left to right, Sorana Caldwell, Gilia Melendez, Camille Wood, Jennifer Leach, Natalie Mozalova and Kinda Knowles. (Nelvin C. Cepeda / San Diego Union-Tribune)
Melody Cooper from Encinitas wore a small white net hat for opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Janessa Francisco on opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Sharon Amezcua wore a black hat hat and blue dress to opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Maddy Tran from San Marcos arrived on opening day of Del Mar Thoroughbred Club dressed with her favorite hat. (Nelvin C. Cepeda / San Diego Union-Tribune)
Francella Perez from Carlsbad wore a bright yellow hat and dress to opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Emma Zuckerman from La Jolla arrived wearing a white/silver hat and matching white dress on opening day at Del Mar Thoroughbred Club.
(Nelvin C. Cepeda / San Diego Union-Tribune)
Sonya Alexander from La Mesa dressed in black to match her black net hat for the hat competition on opening day at the Del Mar Thoroughbred Club. (Nelvin C. Cepeda / San Diego Union-Tribune)
Shevon San Vincente from Escondido posed with her special designed hat during opening day at Del Mar Thoroughbred Club. (Nelvin C. Cepeda / San Diego Union-Tribune)
Jamie Gonsalves wore a bright yellow hat for opening day at Del Mar. (Nelvin C. Cepeda / San Diego Union-Tribune)
Brooke Hasselmann and Kassidy Byers on opening day at the Del Mar Thoroughbred Club. (Nelvin C. Cepeda / San Diego Union-Tribune)
