Royal Ascot: Triennial Stakes Third Leg
| The Triennial Stakes, a three-year cycle of races, comprised a race for  two-year-olds over 5 furlongs which was first contested in 1848 and which later  evolved into the Chesham Stakes; a race for three-year-olds over 7 furlongs  which was first run in 1849 and which later evolved into the Jersey Stakes, and  the third leg, a race for four-year-olds over 2 miles. Horses would return each  year to compete over the increasing distances, although the event was discontinued  after the First World War. | 
| Third Leg of First Triennial Stakes 1850 | Listed race | Once round | ||
| Pos. | Horse | Jockey | Age/weight | Owner | 
| 1 | VATICAN | Fred Templeman | Alec Taylor 4-8st 7lbs | Sir Joseph Hawley 3/1 | 
| 2 | ELTHIRON | Marlow | 4-8st 7lbs | Lord Eglinton 5/2 | 
| 3 | MOUNSEER | F Butler | 4-8st 7lbs | Major Pitt 6/4 fav | 
| 4 | REPLETION | W Abdale | 4-8st 7lbs | Sir F Peacock 5/1 | 
| 5 | MACAW | W Boyce | 4-8st 7lbs | Mr Spilsbury 20/1 | 
| 6 | MARY | Sly | 4-8st 4lbs | Mr E V Fox 20/1 | 
| This race, the inaugural running of the Third Leg of the First Triennial Stakes, took place on Tuesday 11th June 1850 and was won by Vatican, a bay horse by Venison out of Vat, who beat Elthiron and Mounseer by half a length and a short head, to win 700 sovereigns (equivalent to £95,000 in 2020). | Over round 112% | |||
| Triennial Stakes Third Leg | Listed race | Once round | 1850 | ||||||
| 1850 | |||||||||