Two-year-old season Ruffian made her debut at
Belmont Park on May 22, 1974, in a -furlong
maiden special weight race, going off at odds of 4–1 in a field of ten. Breaking from post position nine, she went straight to the front while running the first quarter-mile in 22 seconds. She continued to open up her lead while rounding the turn, completing the half-mile in 45 seconds flat. She eventually won by 15 lengths and tied the track record in a time of 1:03 flat. On June 12, Ruffian faced stiffer company in the -furlong
Fashion Stakes, including two other undefeated fillies, Copernica and Jan Verzel. Despite the step up in class, Ruffian went off as the 2-5 favorite based on her earlier win. She again went to the lead with an opening quarter of 22 seconds with Copernica lengths back. The margin remained the same through the half mile, run in 0:45, but Ruffian started to open up in the stretch. The final margin was lengths to Copernica, with Jan Verzel a further 13 lengths back in third. Ruffian equaled her own track record of 1:03. Ruffian made her third start on July 10 at
Aqueduct Racetrack in the
Astoria Stakes over a distance of furlongs. Facing only three rivals, she went off as the 1-10 favorite with no show betting allowed. She established an early lead while running the first quarter in 0:21. Despite being eased in the final strides, she won by nine lengths in a time of 1:02, setting a new stakes record. She was just one-fifth of a second off the track record set by Raise A Native.
Secretariat's trainer,
Lucien Laurin, said after the race that "[Ruffian] may be better than Secretariat". Another trainer said that she could have won either division of that year's
Hopeful Stakes by twenty lengths. It was the fastest time ever run by a two-year-old, colt or filly, at Saratoga. Ruffian was entered in the
Frizette Stakes on September 26 but was scratched on the day of the race due to a high temperature. Whiteley then considered running her against colts in the
Champagne Stakes but she went off her feed and ran another fever. Veterinarian James Prendergast detected a hairline fracture of her right hind ankle, ruling her out for the rest of the year. Whiteley was later interviewed about the fracture and asked if it were true that it happened during the Spinaway. He answered, "It did happen during the race, she was just a couple of strides from the wire." When asked why he thought Ruffian had not shown any signs of being hurt until later, he replied, "She is a very tough filly, and doesn't like to show any weaknesses." Ruffian missed the rest of the two-year-old season but her five wins were sufficient to earn her the
Eclipse Award for
American Champion Two-Year-Old Filly.
Three-year-old season Ruffian started her three-year-old campaign on April 14 in a six-furlong allowance race at Aqueduct. Despite the long layoff, she was the prohibitive 1-10 favorite in a field of five. She took the lead after a few strides, then ran the opening quarter-mile in 23 seconds flat and the half in 0:45. She won by lengths in a time of 1:09 . She followed up with a victory in the
Comely Stakes at Aqueduct on April 30, winning despite a poor start by lengths. Her time of 1:21 for 7 furlongs set a new stakes record and was just a second off
Dr. Fager's track record. Going off at odds of 1-20 (the legal minimum), she created a
minus pool of $36,064. Ruffian was then targeted at the so-called
Triple Tiara, the filly equivalent of the
American Triple Crown. At the time, the series consisted of the
Acorn Stakes,
Mother Goose Stakes and
Coaching Club American Oaks. On May 31, Ruffian entered the Mother Goose Stakes at Aqueduct as the 1-10 favorite in a field of seven. The start was marred when the filly to Ruffian's right, Dan's Commander, threw her rider. Ruffian was not disturbed and took the lead, running the first quarter-mile in a relatively slow 0:24. Running at her own pace, she completed the half in 0:47 while leading by lengths then completed three-quarters in 1:11 with a two-length lead. Turning into the stretch, she started to draw away and eventually won by lengths while setting a new stakes record of 1:47 for nine furlongs. "I didn't do anything but ride", said Vásquez. In the Coaching Club American Oaks on June 21 at Belmont Park, she was again made the 1-10 favorite despite racing for the first time at a distance of miles. She opened up a 6-length lead on the backstretch but the field closed on her during the far turn, getting as close as 1 length. In the stretch, Ruffian again pulled away to win by lengths over Equal Change, with the third place horse a further nine lengths back. Her time of 2:27 tied the stakes record. Ruffian was undefeated in her first ten races, covering distances from to , with an average winning margin of 8
lengths. She set stakes records in each stakes race she entered.
Final race and death Ruffian's eleventh race was run at
Belmont Park on July 6, 1975. It was a
match race between her and that year's
Kentucky Derby winner,
Foolish Pleasure. Her connections had been asked about running her against colts since early in her career, and Whiteley thought that the
Travers Stakes at Saratoga in August would be a good opportunity. "Prove the point one time and that'll be it," he had said in May. "I don't want to put too much pressure on her." However, Janney felt obligated to enter Ruffian in the July match race due to media and public expectations. He told Whiteley that such a race was inevitable and it would be best to do so on her home track. Vásquez tried to pull her up, but the filly would not stop. She went on running, pulverizing her sesamoids, ripping the skin off her fetlock and tearing her ligaments until her hoof was flopping uselessly. Vásquez said it was impossible for him to stop her. She still tried to run and finish the race. Video showed Ruffian was startled by a bird in the infield and took a bad step. Ruffian was immediately attended to by a team of four
veterinarians and an orthopedic surgeon, and underwent an emergency operation lasting twelve hours, during which she had to be revived twice after she stopped breathing. "It was unfortunate we were in a learning period at the time," said her surgeon, Dr. Edward Keefer, in 2000. "Vets are really doing a hell of a job now and have improved tremendously in their knowledge and how to handle these catastrophic occurrences." Her nose was pointed towards the finish line. In August 2023 it was announced that Ruffian's remains were
exhumed from her grave at Belmont Park and reinterred in Marchmont Cemetery at
Claiborne Farm in
Kentucky where she was born. The decision was made by Stuart Janney III (the son of Ruffian's owners) after consultation with the
New York Racing Association and Claiborne, as Ruffian's grave was located directly on the footprint of where Belmont was in the process of constructing a one-mile synthetic racetrack. Janney expressed hope that more members of the public would be able to pay their respects to Ruffian in her new resting place. ==Racing statistics==