| Piz Gren | |
| Elevation M: | 2890 |
| Prominence M: | 355 |
| Prominence Ref: | [1] |
| Map: | Switzerland |
| Region Type: | Canton |
| Region: | Graubünden |
| Country: | Switzerland |
| Range: | Lepontine Alps |
| Coordinates: | 46.6776°N 9.0227°W |
Piz Gren (German: Schwarzhorn) is a mountain of the Swiss Lepontine Alps, located between Tenigerbad and Lumbrein in the canton of Graubünden. Its summit lies near the tripoint between Val Sumvitg, Val Gronda, and Val Miedra.