Kentucky Derby pedigree profile: So Happy

So Happy wins the Santa Anita Derby at Santa Anita. (Photo by Benoit Photo)
After enjoying early success in sprints, So Happy stretched out over 1 1/8 miles to win the Santa Anita Derby (G1) on the Road to the Kentucky Derby.
Having demonstrated his ability to handle two turns, So Happy now faces a new challenge: the 1 1/4-mile distance of the Kentucky Derby (G1). Is an additional furlong within his distance capabilities? Or will classic distances prove to be beyond his reach?
It’s a fair question since So Happy is a son of Runhappy, the champion male sprinter of 2015. Runhappy excelled sprinting seven furlongs or less, going 7-for-7 while scoring wins in the Breeders’ Cup Sprint (G1), King’s Bishop (G1), and Phoenix (G3). In contrast, he failed to finish better than fourth in three starts over distances from one mile to 1 1/16 miles.
But even though Runhappy was a sprinter, his pedigree offered potential for success around two turns. His sire, Super Saver, won the 2010 Kentucky Derby and has since sired a handful of high-profile route racers. They include Happy Saver, winner of the 1 1/4-mile Jockey Club Gold Cup (G1); Letruska, a five-time Grade 1 winner over distances from 1 1/16 miles to 1 1/8 miles; Embellish the Lace, conqueror of the 1 1/4-mile Alabama (G1); and Inside Straight, winner of the 1 1/8-mile Oaklawn H. (G2).
Furthermore, Runhappy’s dam, Bella Jolie, scored her two wins racing 1 1/16 miles and one mile and 70 yards. Her other foals include Any Questions, a six-time winner over distances from one mile to 1 1/8 miles; Curlins Vow, a four-time winner from one mile to 1 1/8 miles; and Prayer Book, a two-time winner over one mile to 1 1/16 miles.
Bella Jolie, in turn, is a daughter of Broken Vow, winner of the Philip H. Iselin H. (G2) and Ben Ali (G3) racing 1 1/8 miles. Broken Vow’s sire, Unbridled, won the 1990 Kentucky Derby, and Broken Vow’s dam sire—Nijinsky II—swept the British Triple Crown.
| Pedigree | ||
| Super Saver | ||
| Runhappy | ||
| Bella Jolie | ||
| So Happy | ||
| Blame | ||
| So Cunning | ||
| So Glitzy |
With so many talented route racers in Runhappy’s pedigree, he has the potential to pass on stamina at stud. And once in a while, he does. While the average winning distance of Runhappy’s progeny is a sprint-oriented 6.6 furlongs, he’s nevertheless the sire of Smile Happy, winner of the Kentucky Jockey Club (G2) and Alysheba (G2) over 1 1/16 miles, and Happy American, conqueror of the 1 1/16-mile Louisiana (G3) and a two-time winner racing 1 1/4 miles at Churchill Downs.
Even better, So Happy doesn’t have to rely exclusively on Runhappy for stamina. The dam side of his pedigree may also contribute long-winded genetics to the mix.
So Happy was produced by the Blame mare So Cunning. Although So Cunning scored both of her wins in six-furlong sprints, she only ran three times in total and never tackled a two-turn race.
As a daughter of Blame, So Cunning might have proven effective running long if given sufficient opportunity. Blame was a top-tier route racer voted champion older male of 2010 after winning the Breeders’ Cup Classic (G1), Whitney H. (G1), and Stephen Foster H. (G1) over distances from 1 1/8 miles to 1 1/4 miles.
Blame often passes on stamina at stud, with his progeny compiling a solid average winning distance of 7.3 furlongs. The best include Sibayan, winner of the 2,400-meter (about 1 1/2-mile) Preis von Europa (G1); Senga, triumphant in the 2,100-meter (about 1 5/16-mile) Prix de Diane (G1); Wet Paint, conqueror of the 1 1/8-mile Coaching Club American Oaks (G1); Nadal, winner of the 1 1/8-mile Arkansas Derby (G1); and Fault, victorious in the 1 1/8-mile Santa Margarita (G1).
#2 Wet Paint surges to win the G1 Coaching Club American Oaks at Saratoga under Flavien Prat for trainer @bradcoxracing and owner @godolphin! 🎨🏆
— TwinSpires Racing 🏇 (@TwinSpires) July 22, 2023
🎥 #TwinSpiresReplay pic.twitter.com/J4QFiyft9v
Meanwhile, daughters of Blame have foaled major winners over a variety of distances. Simply in Front won the one-mile First Lady (G1). Forte won the 1 1/8-mile Florida Derby (G1), 1 1/16-mile Breeders’ Cup Juvenile (G1), and 1 1/16-mile Breeders’ Futurity (G1), in addition to finishing second in the 1 1/2-mile Belmont (G1). Reef Runner nabbed the 6 1/2-furlong Eddie D (G2) and 1,400-meter (about seven-furlong) 1351 Turf Sprint (G2), Switzerland took the 1,200-meter (about six-furlong) Coolmore Stud (G1), Kilwin starred in the seven-furlong Test (G1), and World Beater stayed 1 3/16 miles in the Saratoga Derby (G1).
So Happy doesn’t have the strongest distance pedigree among potential 2026 Kentucky Derby contenders, and it’s possible 1 1/8 miles is the upper end of his distance range. But there’s also a chance the stoutest genetics of Runhappy have combined with the stamina of Blame to give So Happy a shot at staying 1 1/4 miles on the first Saturday in May.

