Secretariat by the Numbers: Why His Speed Records Still Stand Today

Last updated: June 22, 2026

By: Miles HenryFact Checked

Secretariat’s legend gets told the same way every time — big margins, famous calls, a 31-length Belmont. But the real case for Secretariat isn’t the margin. It’s the math. Fifty years later, the clock still hasn’t caught him. Not at Churchill Downs. Not at Belmont Park. Not even close. This is where the argument actually ends — and where most people misunderstand what “fastest horse ever” really means.

Why Secretariat Still Owns the Clock

The Kentucky Derby record has stood since May 5, 1973. The Belmont Stakes record has stood since June 9, 1973. In that time, American racing has produced Triple Crown winners, Breeders’ Cup champions, and horses with Beyer figures that would have dominated any era. None of them have touched either mark. The question of whether Secretariat was the fastest horse to ever race is not a matter of nostalgia — it is a matter of records that have been tested against the best horses of five decades and have not moved. At some point, a record stops being historical and starts being structural. That’s where these sit.

Secretariat’s Early Years: Pedigree and Development

Secretariat was foaled on March 30, 1970, at Meadow Stud in Virginia. His sire was Bold Ruler — a dominant stallion known for transmitting exceptional speed — and his dam was Somethingroyal, who contributed durability and stamina. The combination was unusual. Bold Ruler typically passed on speed at shorter distances. Somethingroyal’s influence pushed toward stamina. The result was a horse that could run the Kentucky Derby distance like a sprinter and the Belmont distance like a machine that got faster the longer it ran.

By the time his two-year-old season was complete, Secretariat had won the Horse of the Year title — a distinction almost never given to a two-year-old. His exercise rider Jim Gaffney described his motion as having a “beautiful fluid quality” that set him apart from every other horse in training. The racing world understood something exceptional was happening. What they did not yet know was how exceptional.

The Record-Shattering 1973 Season

The Kentucky Derby. On May 5, 1973, Secretariat ran the Kentucky Derby in 1:59 2/5 — the first horse in the race’s history to break the two-minute barrier. His split times told the real story: :25 2/5, :24, :23 4/5, :23 2/5, :23. He ran each quarter-mile faster than the one before it. Most horses run the first fraction fast and slow as fatigue builds. Secretariat ran the last quarter of a mile-and-a-quarter race faster than he ran the first. No horse since has seriously threatened the record. The gap isn’t inches — it’s daylight at the highest level of the sport. That kind of pace profile also breaks the basic rule handicappers rely on: early speed costs you late. Secretariat didn’t just defy the field — he broke the model.

The Preakness Stakes. Two weeks later at Pimlico, Secretariat made a move on the backstretch that ran through the field as if the other horses were standing still. The performance itself was decisive — the Preakness was not close. However, the timing record requires honesty: Pimlico’s official figure has varied between 1:53 flat and 1:53 2/5 across different sources, and Oxbow ran 1:53.46 in 2013, which complicates a clean “record still stands” claim. The Derby and Belmont are the unambiguous achievements.

The Belmont Stakes. On June 9, 1973, Secretariat won the Belmont Stakes by 31 lengths — the longest winning margin in Triple Crown history — in a time of 2:24 flat for a mile and a half. That record has stood for over 50 years. No horse has run within two seconds of it. Chic Anderson’s call on CBS captured what everyone watching felt: “Secretariat is widening now! He is moving like a tremendous machine!” At that distance, against that level of competition, that time doesn’t look like a record. It looks like a different category of performance. For more on what actually determines racehorse speed, see our full breakdown.

Secretariat — Triple Crown records at a glance

Race	Secretariat’s Time	Previous Record	Improvement	Record Status (2026)
Kentucky Derby	1:59 2/5	2:00	−0.4 sec	Still stands
Preakness Stakes	1:53 (disputed)	1:54	−1 sec	Disputed — Oxbow ran 1:53.46 in 2013
Belmont Stakes	2:24 flat	2:26.6	−2.6 sec	Still stands
Closest modern Belmont	American Pharoah: 2:26.65	—	+2.65 sec off record	2015

The Physical Traits That Made It Possible

Standing 16.2 hands and weighing over 1,100 pounds, Secretariat’s build was exceptional even by Thoroughbred standards. His chest was so broad it required a custom-made girth. His hindquarters were notably more muscular than typical racehorses of his era — the kind of conformation horsemen describe as “built from behind,” meaning the engine is in the back. His sloping shoulders allowed for a long, reaching stride, and his deep barrel provided lung capacity that most Thoroughbreds simply do not have.

Sportswriter Charles Hatton famously remarked after examining him that “his only point of reference is himself.” That observation holds. His stride was estimated at 25 feet — a length that, combined with his stride frequency, produced the ground-covering efficiency that made 31-length victories possible. For more on what conformation means for performance, see why horse conformation matters.

The Science: Heart, Stride, and Muscle

When Secretariat was euthanized in 1989 due to laminitis, the veterinarian who performed the necropsy discovered something that explained everything. His heart weighed approximately 22 pounds. The average Thoroughbred’s heart weighs 8–9 pounds. The largest heart previously recorded in a racehorse was around 14 pounds. Secretariat’s heart was nearly three times normal size — documented by the Kentucky Derby Museum — a capacity that stood well outside the normal range observed in Thoroughbreds.

A larger heart means more blood pumped per beat, more oxygen delivered to muscles per stride, and less fatigue accumulation over distance. This is why Secretariat did not tire at the end of the Belmont — his cardiovascular system was still operating comfortably at a pace that would have destroyed any other horse in the field.

His muscle composition combined fast-twitch fibers — responsible for explosive acceleration — with an unusually high proportion of slow-twitch fibers, which sustain effort over distance. Most elite sprinters are heavily weighted toward fast-twitch. Most stayers toward slow-twitch. Secretariat had both in proportions that should not physiologically coexist at elite levels. This is why he could run the first quarter of the Derby like a sprinter and the last quarter of the Belmont like a distance horse still accelerating. For a deeper look at what drives racehorse speed, see the science of horse speed.

How Secretariat Compares to Other All-Time Greats

The horses most often mentioned alongside Secretariat are Man o’ War, Dr. Fager, and the modern Triple Crown winners. Each comparison is worth making honestly. The key is this: “fastest” depends entirely on distance. Change the distance, and you change the answer.

Secretariat vs. all-time greats — key comparisons

Horse	Era	Best Distance	Key Achievement	Belmont Time
Secretariat	1973	1½ miles (classic)	Triple Crown — records in Derby and Belmont	2:24 flat
Dr. Fager	1968	1 mile	World record mile: 1:32.1 (134 lbs)	Did not run
Man o’ War	1919–1920	Classic distances	20-1 record; dominated his era	Pre-standardized timing
American Pharoah	2015	1½ miles (classic)	First Triple Crown since 1978	2:26.65
Flightline	2022	1¼ miles	Retired unbeaten, 6 from 6	Did not run

My personal favorite among the all-time speed horses is Dr. Fager — the 1968 Horse of the Year who set the world record for the mile running 1:32.1 at Arlington Park while carrying 134 pounds. That performance is one of the most extraordinary things I’ve studied in this sport. But Dr. Fager and Secretariat were dominant at different distances. Asking which was faster is like asking whether a sprinter or a marathon runner is the better athlete — the answer depends entirely on the distance you choose.

Man o’ War is the strongest historical argument against Secretariat’s claim. He was 20-1 in 21 races and dominated his era completely. The problem is that his records were set before standardized timing on tracks of inconsistent preparation. He was great — whether he was faster than Secretariat at classic distances is something the clock cannot answer across a 53-year gap.

Among modern horses, American Pharoah’s Belmont time of 2:26.65 is the closest anyone has come to Secretariat on the same track under the same conditions. Two and a half seconds in a horse race is an eternity. Secretariat’s Belmont average of approximately 37.5 mph over 1½ miles remains unmatched as a sustained race performance. Seabiscuit is a remarkable horse but a different argument — his greatness was resilience and durability, not speed at classic distances.

Sustained race speed comparison — classic distance performances

Horse	Distance	Time	Avg Speed	Context
Secretariat	1½ miles (Belmont)	2:24.00	~37.5 mph	Race — record still stands (2026)
American Pharoah	1½ miles (Belmont)	2:26.65	~36.8 mph	Race — closest modern comparison
Dr. Fager	1 mile	1:32.1	~39.1 mph	Race — world record, 134 lbs carried
Winning Brew	2 furlongs	20.57 sec	~43.97 mph	Timed trial — not a race

Why Some Say Secretariat Wasn’t the Fastest

The main counterargument comes from sprint speed. Horses like Winning Brew have been clocked at nearly 44 mph over two furlongs in timed trials — faster than Secretariat’s race averages. Some argue that timing technology in 1973 was less precise than modern systems, making era comparisons unreliable. Others point to Dr. Fager’s world record mile as evidence that Secretariat was not even the fastest horse of his own decade at shorter distances.

These objections are worth hearing but none survive contact with what “fastest horse to race” actually means. Winning Brew’s two-furlong trial was not a race. Sprint speed over 440 yards tells you nothing about sustained performance at classic distances. Timing precision in 1973 was sufficient to establish records that have been tested against modern measurement for 50 years. And Dr. Fager’s dominance at the mile does not diminish Secretariat’s dominance at a mile and a half — they were exceptional at different distances. At classic race distances under real race conditions, no horse in recorded history has produced times that approach Secretariat’s 1973 Triple Crown. The counterarguments address a different question. Secretariat answered the one that matters in championship racing.

Legacy and Breeding Impact

Secretariat’s career as a sire was modest by commercial standards — his sons were generally disappointing at the track. The prevailing theory is that his combination of traits was too rare and too specific to transmit reliably. You cannot simply breed a 22-pound heart into a horse by pairing two champions.

His daughters, however, became some of the most influential broodmares in Thoroughbred history. Through the female line, Secretariat’s genetics continue appearing in pedigrees of champions across multiple decades. His influence is present in the bloodlines of horses racing today — not directly, but through the maternal lines his daughters established. The history of the Triple Crown runs through Secretariat in ways that continue to shape breeding decisions.

His cultural legacy is equally durable. The Disney film Secretariat (2010) introduced his story to a generation that had not watched him run. Statues at Belmont Park and the Kentucky Horse Park mark his place in the sport’s history. His name is the first reference point in any serious conversation about racehorse greatness — not because of sentimentality, but because the records he set have not been surpassed.

The 1973 Triple Crown records have been tested against 50 years of modern training, modern tracks, and modern horses. The Kentucky Derby and Belmont marks have not moved. That is not sentiment. That is the stopwatch — and the stopwatch doesn’t argue.