| Boul | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Bacău County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Grigoreni, Scorțeni |
| Length: | 12km (07miles) |
| Source1: | Dulap Hill |
| Source1 Coordinates: | 46.6194°N 26.6739°W |
| Source1 Elevation: | 407m (1,335feet) |
| Mouth: | Tazlău |
| Mouth Location: | Downstream of Scorțeni |
| Mouth Coordinates: | 46.5336°N 26.6631°W |
| Mouth Elevation: | 290m (950feet) |
| Basin Size: | 24km2 |
The Boul is a left tributary of the river Tazlău in Romania.[1] It discharges into the Tazlău near Scorțeni. Its length is 12km (07miles) and its basin size is 24km2.