| Bold Reasoning | |
|---|---|
| Sire | Boldnesian |
| Grandsire | Bold Ruler |
| Dam | Reason To Earn |
| Damsire | Hail To Reason |
| Sex | Stallion |
| Foaled | 1968 |
| Country | United States |
| Colour | Brown |
| Breeder | Leon Savage |
| Owner | Kosgrove Stable |
| Trainer | Nick Gonzales |
| Record | 12: 8-2-0 |
| Earnings | $189,564 |
| Major wins | |
| Jersey Derby (1971) Withers Stakes (1971) | |
Bold Reasoning (April 29, 1968 – April 24, 1975) was an American thoroughbred racehorse. He is best known as being the sire of the 1977 Triple Crown winner, Seattle Slew.