||The Thoroughbred Messenger (1780-1808) arrives from England. His descendants, through Hambletonian 10, become the founders of the American Standardbred horse.
||The National Association of Trotting Horse Breeders is organized.
||Yankee, a gelding, trots a mile in 2:59. It is the first recorded performance by an American trotter.
||Sweetzer becomes the first 2:15 pacer and Rarus lowers the trotting record to 2:131/.
||The Union Course, Long Island, NY holds the first major public trotting race in America.
||The National Association of Trotting Horse Breeders establishes The Standards for trotting horses.
||The New York Trotting Club is established.
||Johnston becomes the first 2:10 pacer at Chicago, Illinois. The following year Jay Eye See becomes the first 2:10 trotter.
||Historic Track in Goshen, NY is constructed.
||The first volume of Wallace's Year Book, a precursor to the USTA Year Book and Sires & Dams Register, is published.
||Lady Suffolk, &The Old Grey Mare,& sets a trotting record of 2:291/4 at Hoboken, NJ.
||Using natural gas illumination, the first official night racing is held. Walnut Hall Farm is established in Lexington, Kentucky.
||2-year-old, Hambletonian 10 (1849-1876), stands his first season. His fee is $25.
||The first Kentucky Futurity is raced at The Red Mile for a purse of $11,850.
||Flora Temple becomes the first 2:20 trotter.
||Star Pointer (Brown Hall-Sweepstakes) a pacer, becomes the first 2:00 Standardbred with a 1:59 mile.
||The National Trotting Association, forerunner of the United States Trotting Association, is formed.
||The great pacing champion Dan Patch (1896-1916) (Joe Patchen-Zelica) wins his first race, at age 4. He is purchased in 1902 by M.W. Savage for $60,000. In 1905, he sets a record of 1:551/. The record stands for 33 years.
||The first volume of the American Trotting Register is published by John Wallace.
||The mare Lou Dillon (Sidney Dillon-Lou Milton) becomes the first 2:00 trotter.
||Grand Circuit racing begins for trotters. Pacing events are not permitted.
||Harness racing's first $50,000 race, The American Trotting Derby, is held.
||Goldsmith Maid (1857-1885) becomes the first 2:15 trotter, with a 2:143/4 mile. She retired in 1877 with a record 350 wins. Hobbles are introduced for pacers.
||The first Hambletonian Stake is held and Hanover Shoe Farms is established.
||The first major pacing race, the "Pacing Championship of the United States" is held. The purse is $5,000.
The famous Red Mile in Lexington, KY opens. Racing is sponsored by the Kentucky Trotting Horse Breeders Association.
||The Trotting Horse Club of America is founded.
||The Hambletonian is moved from Syracuse, NY to Good Time Park in Goshen, NY.