| Opened | September 1, 1955 |
| Last Race Date | October 10, 1982 |
| Racing Type | Thoroughbred, Quarter Horse |
| Abbreviation | PJ |
| Purse Value Index | 1 |
| Signature Race | South Dakota Derby |
- 09/01/1955 Opens for racing as Tri-State Park.
- 09/01/1958 Tracks name is changed to Park Jefferson.
- 09/01/1958 Opening night as Park Jefferson drew a record 5,245 race fans,
- 06/27/1968 The Schoepf brothers, Ken, Doug and Brad finish 1-2-3 in race.
- 08/31/1980 On this date $212,348 was bet, most ever at Park Jefferson.
- 10/10/1982 Last race is run at Park Jefferson.