2000: two-year-old season Keltos made his racecourse debut in the Prix Diatome over 1400 metres on
heavy ground at
Saint-Cloud Racecourse on 14 November in which he started at odds of
7.5/1 in a ten-runner field. Ridden by
Dominique Boeuf, he finished second, two and a half
lengths behind the
André Fabre-trained Walking Around.
2001: three-year-old season Keltos recorded his first success on his three-year-old debut in the Prix Callitrate at Saint-Cloud on 15 March as he won "very easily" by five lengths from the
Alain de Royer-Dupré-trained Early Days. He was even more impressive in the Prix du Vert Galant at
Longchamp Racecourse on 8 April as he took the lead approaching the last 200 metres and drew right away from his six opponents to win by ten lengths. The colt was then moved up sharply in class for the
Group One Poule d'Essai des Poulains over the same course and distance on 13 May and started favourite despite racing on much firmer ground than he had previously encountered. He appeared to be outpaced in the closing stages and finished sixth behind
Noverre, although he was promoted to fifth when the "winner" was disqualified. He was dropped to Listed class at the end of the month for the Prix de Pontarme at
Chantilly Racecourse and recorded his third win of the season as he won by three-quarters of a length from Spanish Don. For his fifth run of the season, Keltos was sent to England to contest the
St James's Palace Stakes over one mile at
Royal Ascot in June. He started a 33/1 outsider and never looked likely to win, but kept on well in the straight to finish sixth of the eleven runners behind
Black Minnaloushe. After a break of four and a half months, Keltos returned in November for the Group Three
Prix Perth at Saint-Cloud in which he was matched against older horses for the first time. Racing on his favoured soft ground and ridden by
Davy Bonilla he headed the betting market at odds of 1.8/1 in a fourteen-runner field. The best fancied of his opponents were Kingsalsa (winner of the
Prix du Chemin de Fer du Nord), Lugny (a successful performer in
handicap races), Bedawin (
Grand Prix de Marseille) and the British challenger Cornelius. Keltos raced just behind the leaders as Cornelius set the pace and turned into the straight in third place. He stayed on well in the closing stages to catch the British gelding in the final strides and won by a short head to secure his biggest win up to that time.
2002: four-year-old season In early 2002 Keltos was sent to the
United Arab Emirates to contest the seventh running of the
Dubai World Cup on dirt at
Nad Al Sheba Racecourse on 23 March. Starting a 66/1 outsider he reached fourth place in the straight but then faded to finish eighth behind
Street Cry. On his return to Europe the colt started 6/5 favourite for the Group Two Prix du Muguet at Saint-Cloud on 1 May. Cornelius, Bedawin and Lugny were again in opposition whilst the best of the other five runners appeared to be the
John Gosden-trained Binary File. Ridden by
Olivier Peslier, he turned into the straight in seventh place before running on strongly in the last 400 metres. He overtook Cornelius and Mahfooth 100 metres out and drew away to win by two lengths. Keltos was then sent to England for the Group One Lockinge Stakes over one mile at
Newbury Racecourse on 18 May in which he was again ridden by Peslier. As he had not been among the original entries his owners had to pay a supplementary entry fee of £12,000. Noverre started favourite ahead of Olden Times (
Prix Jean Prat) with Keltos the 9/1 joint third favourite alongside No Excuse Needed (
Celebration Mile) and Swallow Flight (
Sandown Mile). The other five runners were
Summoner (
Queen Elizabeth II Stakes), Warningford (
Leicestershire Stakes), Cape Town (
European Free Handicap), Atavus (
Hungerford Stakes) and Umitstim (
Craven Stakes). Peslier settled the colt towards the rear of the field as Summoner set the pace before Noverre went to the front a quarter of a mile from the finish. After being hampered as he attempted to obtain a clear run, Keltos moved up alongside Noverre a furlong out and then drew away to win "comfortably" by three and a half lengths. After the race Peslier said "I thought I would come late. I moved inside and he was blocked a little bit. But my horse travelled very well and I just waited a little bit because my horse has got a good turn of foot".
2004: six-year-old season Keltos had serious fertility problems as a breeding stallion at the Airlie Stud in Ireland in 2005 and was returned to training as a six-year-old in 2004. He made a successful comeback in the Prix Carteret over 1400 metres at
Maisons-Laffitte in April, winning by a length and a half from Am Brose. In July he finished runner up in Listed races at
Nantes and
Vichy and then finished second to Maxwell in the Group Three
Prix Quincey at
Deauville Racecourse in August. In September he started favourite for the Group Three
Prix du Pin at Longchamp but finished fourth of the twelve runners behind Comete. In October he finished fifth in the
Prix Daniel Wildenstein and then went to England for the
Challenge Stakes at
Newmarket Racecourse where he finished second to the
Godolphin runner Firebreak. At the end of the month he attempted to repeat his 2001 success in the Prix Perth, but after taking the lead 200 metres out he was overtaken in the final strides and finished third behind Valentino and Svedov. On his final start of the year he was dropped back to Listed class for the Prix Tantieme over 1600 metres on heavy ground at Saint-Cloud on 23 November and started 4/5 favourite in a nine-runner field. Ridden by Miguel Blancpain he took the lead 300 metres out and held off the German challenger Salon Turtle to win by three quarters of a length.
2005: seven-year-old season In March 2005 Keltos was again sent to Dubai but his second visit to Nad Al Sheba proved even less successful than his first as he finished last of the twelve runners in the
Godolphin Mile. On his return to Europe he finished unplaced behind Martillo in the Prix du Muguet and then contested the Prix Volandry over 1600 metres at Saint-Cloud on 6 June. Ridden by Peslier, he was beaten a neck by the five-year-old mare Together but was awarded the race when the "winner" was disqualified. In his two remaining races he finished fourth in a Listed race at Nantes and seventh in a Listed race at Deauville on 2 August. ==Stud record==