| Opened | Unknown |
| Last Race Date | Still in Operation |
| Racing Type | Thoroughbred, Quarter Horse |
| Abbreviation | Un |
| Purse Value Index | 1 |
| Signature Race | Queen's Handicap |
- 00/00/0000 Eastern Oregon Livestock Show opens for pari-mutual racing.
| Opened | Unknown |
| Last Race Date | Still in Operation |
| Racing Type | Thoroughbred, Quarter Horse |
| Abbreviation | Un |
| Purse Value Index | 1 |
| Signature Race | Queen's Handicap |