| Opened | July 1, 1914 |
| Last Race Date | November 3, 1993 |
| Racing Type | Thoroughbred |
| Abbreviation | Mar |
| Purse Value Index | 6 |
| Signature Race | Marlboro Nursery Stakes |
- 07/01/1914 Runs Inaugural meet.
- 10/17/1970 Fans bet $859,520 to set all time record handle.
- 09/30/1972 Final race run at Marlboro.
- 09/03/1980 Marlboros grandstand burns to the ground.
- 10/00/1988 12,133 fans set record, as racing returns for two days.
- 11/03/1993 Purely Irish is last horse to visit winners circle.