Midnight Bisou (foaled April 18, 2015) is a retired American Thoroughbred racehorse who was the Champion Older Female Horse of 2019 after being one of the top-ranked fillies of 2018.

In 2019 at age four, she won seven straight stakes races including the Grade I Apple Blossom, Ogden Phipps, and Personal Ensign.

[1][4] Midnight Bisou's first start was a six-furlong maiden race on October 27, 2017, at Santa Anita Park, where she went off at odds of 21–1 in a field of 11.

She won five times, including the Grade I Santa Anita Oaks and Cotillion Stakes, with one second-place finish and three thirds.

Ridden for the first time by Mike Smith, she stalked the early pace but lost a bit of position while racing four wide around the far turn.

"[3][6] She was the heavy favorite in the Santa Ysabel Stakes, her first two-turn race at a distance of 1+1⁄16 miles and run over a sloppy track.

She settled a few lengths behind the early pace set by Spring Lily, then started her move on the final turn while racing three wide.

"[10] The three wins gave Midnight Bisou 160 points on the 2018 Road to the Kentucky Oaks, qualifying her in first place[11] and making her one of the early favorites for the race.

[13][14] Breaking from post position 10, Midnight Bisou was squeezed at the start and raced at the back of the pack while moving three wide around the first turn.

With three-eighths of a mile remaining in the race, she was in tenth place, 8+1⁄2 lengths behind Monomoy Girl, who had moved to the lead after stalking the early pace.

[16] She was also transferred to the stable of Steve Asmussen as her owners wished to pursue major stakes on the East Coast, instead of staying in California where Spawr was based.

Facing only three rivals, she raced close to the pace and kicked clear at the head of the stretch to win by six lengths.

Monomoy Girl tracked the early pace in third while Midnight Bisou sat a few lengths farther back in fifth.

"[21][22] Both Monomoy Girl and Midnight Bisou received a Beyer Speed Figure of 101 for the race, a career best for both at the time.

She settled at the back of the pack then made a late run, taking the lead in the final strides to win by three-quarters of a length.

"It's her first race back, and I was really getting forced out in the first turn, and it would have had to be six-, seven-, eight-wide the whole way, so I thought, 'Let's take it a little easy on her,' so I dropped in behind them," said Smith.

"[25][26] On March 16, Midnight Bisou made her next start in the Azeri Stakes at Oaklawn Park where the field of five included four Grade I winners.

On the rail turning for home, Midnight Bisou lacked racing room so Smith waited until a hole opened in midstretch.

"[29][30] Once again carrying the top weight of 123 pounds, Midnight Bisou next entered the Ogden Phipps Stakes on June 8 at Belmont Park.

Carrying 117 pounds, Come Dancing was made the 4-5 favorite in a field of five after earning a career high Beyer Speed Figure in her previous start.

Turning into the stretch, Midnight Bisou accelerated and pulled away to win by 3+1⁄2 lengths while setting a stakes record of 1:39.69 for 1+1⁄16 miles.

The race was delayed for three hours due to exceptionally high temperatures along the east coast, although the sea breeze at Monmouth Park made it somewhat easier on the horses.

"[33][34] Midnight Bisou returned to Saratoga for the Personal Ensign Stakes on August 24, in which she carried the top weight of 124 pounds.

She again faced Elate, carrying 120 pounds, who had won the Fleur de Lis and Delaware Handicaps since the two had last met in the Apple Blossom.

[38] In the NTRA Top Thoroughbred Poll of August 26, she was ranked second among all active race horses in North America, behind just Bricks and Mortar.

[39] Midnight Bisou made her next start in the Beldame Stakes at Belmont on September 28, ridden by John Velazquez as Mike Smith was not available for the race.

Wow Cat remained in contention until late in the stretch when Midnight Bisou started to draw away, winning by 3+1⁄2 lengths.

"[40][41] Despite some interest in having her make her final start of the year against male horses in the Breeders' Cup Classic, Bloom said they would stick to the fillies and mares division.

"[41] Her owners originally planned to sell Midnight Bisou at the Fasig-Tipton November sale as a broodmare prospect.

[42] In the Breeder's Cup Distaff, Midnight Bisou was defeated by the Argentinian mare Blue Prize, who was then sold as a broodmare prospect at the Fasig-Tipton sale.