Karl Merton Ferron / Baltimore SunTyler Mowlds of Timonium helps his wife Mateja Mowlds through the muddy sand toward the entry point during 2018 Preakness Day at Pimlico Race Course.
Glenn Fawcett / Baltimore SunJoe Sanza (left) and Amanda Branch are prepared for rain while resting at the 2002 Preakness
Karl Merton Ferron / Baltimore SunCharles Williams of Annapolis helps Rachel Rowe of Hagerstown -- who is wearing pumps -- through the muddy infield during 2018 Preakness Day at Pimlico Race Course.
Kim Hairston / Baltimore SunAlex Frantz of Bethesda wears wiper glasses and an umbrella hat in a steady rain in the Infield.
Lloyd Fox / Baltimore SunSarah Kippins, 24, and Kate Sanner, both from New York City, wear rain boots to the 2016 Preakness.
Emma Patti Harris / Baltimore SunGeorgia Michael of Jarrettsville wears a hat made from an umbrella during a wet 141st Preakness Stakes.
Jerry Jackson / Baltimore SunFans seek shelter from the rain underneath the grandstand prior to the eighth race on Preakness Day in 2013.
Kim Hairston / Baltimore SunRebecca Spade, in heels, and Greg Campbell, wearing white pants, cross mud and water as they enter the gates to Pimlico Race Course for the 141st Preakness.
Christopher T. Assaf / Baltimore SunWendy Myers, with her husband, Nick, are prepared for the rain that fell just before the running of the140th Preakness Stakes at Pimlico. The Huntingtown couple braved the rain in their seats while others took cover.
Lloyd Fox / Baltimore SunMr. Z and American Pharoah lead the horses into the first turn of the 140th Preakness Stakes at Pimlico Race Course. Rain poured as the race began.
Christopher T. Assaf, Baltimore SunThe rain doesn't not dampen the spirit of one race spectator, nor her hat, as the the weather changed quickly before the 140th running of the Preakness Stakes at Pimlico.
Karl Merton Ferron / Baltimore SunKalie Redden of Sykesville wades through the mud at the infield during 2018 Preakness Day at Pimlico Race Course.
Lloyd Fox / Baltimore SunKim Bray, 53, Lutherville wears black-and-white striped rain boots.
Robert K Hamilton/Baltimore SunRace goers cheer and try to stay dry during the 140th running of the Preakness Race.
Kim Hairston / Baltimore SunPeople cross mud and puddles as they enter the gates for the 2016 Preakness at Pimlico Race Course.
Nick Wass / APA woman tries to keep her all-white ensemble and heels intact while walking through the mud.
Brittany Britto / The Baltimore SunElla Yeargin of Baltimore stays dry while still showing off her outfit with a see-through rain coat.
Erin Cox / Baltimore SunMiniskirts and Wellington boots were the choice of many.
Lloyd Fox / Baltimore SunAlysa McKenna, 36, of Miami wears polka-dot rain boots to the 2016 Preakness.
Christopher T. Assaf / Baltimore SunA member of the grounds crew rakes the track at as water begins to build up before the 140th running of the Preakness Stakes at Pimlico Race Course.
Matt Roth / Baltimore Sun Media GroupDark clouds hang over the Pimlico Race Course infield on Preakness Day in 2007.
Christopher T. Assaf / Baltimore SunSpotted at the 141st Preakness: Mud and colored pants.
Karl Merton Ferron / Baltimore SunWade Stancovich of Eldersburg helps Nicole Alvarez of Sykesville walk through the mud at the infield during 2018 Preakness Day at Pimlico Race Course.
Maddie Meyer / Getty ImagesRace fans exit the track during heavy rain before the 140th running of the Preakness Stakes at Pimlico Race Course on May 16, 2015 in Baltimore.
Lloyd Fox, Baltimore SunLashaunda Selassie and her son, Jonah Dixon,4, brave the heavy rain to take a tour of Pimlico. Preakness horses at Pimlico Race Course getting ready for the 139th running of the Preakness Stakes.
Karl Merton Ferron / Baltimore SunCharles Williams of Annapolis helps Rachel Rowe of Hagerstown -- who is wearing pumps -- through the muddy infield during 2018 Preakness Day at Pimlico Race Course.
Karl Merton Ferron / Baltimore SunSpectators avoid puddles as they walk through the muddy infield during 2018 Preakness Day at Pimlico Race Course.
Lloyd Fox / Baltimore SunThe heravy rains for the past several days left Pimlico Race Course covered in mud.
Jerry Jackson / Baltimore SunRubber boots appear to be the appropriate fashion for the infield crowd at Preakness.
Lloyd Fox / Baltimore SunStephanie McVey, 52, of Westminster wears animal-print rain boots to the 2016 Preakness.
Maddie Meyer / Getty ImagesSandals may not have been the best choice.
Karl Merton Ferron / Baltimore SunCharles Williams of Annapolis helps Rachel Rowe of Hagerstown -- who is wearing pumps -- through the muddy infield during 2018 Preakness Day at Pimlico Race Course.
Gene Sweeney / Baltimore SunJoe Miller helps Anna McKnight get across a mud pit on the infield at the 2005 Preakness at Pimlico Race Course.
Robert K Hamilton/Baltimore SunRacing fans try to stick it out as a torrential downpour started just before American Pharoah won the 140th Preakness Race.
Glenn Fawcett / Baltimore SunA Preakness fan dives in the infield mud during the 2005 Preakness at Pimlico.
Karl Merton Ferron/Baltimore SunAmerican Pharoah (1), ridden by Victor Espinoza, and the field burst from the starting gate as heavy rain comes down at the 140th Preakness Stakes.
Maddie Meyer / Getty ImagesOne Preakness-goer decided to forgo footwear altogether.
Kim Hairston / Baltimore SunFrom left, Butch Haussener of Lebanon, Pa., and James Beam of Geneva, N.Y., walk around the infield. Beam is wearing swim trunks and found the umbrella hat.
Lloyd Fox / Baltimore SunCurtis Baer and his wife Jodie Stine take shelter from the rain at the 138th Preakness
Maddie Meyer / Getty ImagesThis race fan is prepared with pink rain boots.
Jeffrey F. Bill / Baltimore SunFrom left, Vickie Kelly, Grace Ross and Rachel Hinkley aren't bothered by the wet weather during the early races at the 2013 Preakness.
Karl Merton Ferron / Baltimore Sun
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Tyler Mowlds of Timonium helps his wife Mateja Mowlds through the muddy sand toward the entry point during 2018 Preakness Day at Pimlico Race Course.
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Morning-line favorite Square Shooter pulled ahead of American Sailor midway through their 5-furlong race before finishing strong to win in the fourth event Saturday at the Preakness.
Just five of the 12 horses expected to race on the turf did so, with the Potts Wayne-trained 6-year-old claiming its 10th win in 30 career starts against the field of entrants 3 years old and above.
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Square Shooter paid $5.60 to win. Runner-up Big Bella Brown paid $3.80, while third-place Grandiflora paid $2.80.