Cupaș
| Cupaș | |
|---|---|
| Location | |
| Country | Romania | 
| Counties | Harghita, Neamț | 
| Physical characteristics | |
| Source | Hășmaș Mountains | 
| Mouth | Bicaz | 
|  • coordinates | 46°48′19″N 25°48′25″E / 46.8052°N 25.8069°E | 
| Length | 7 km (4.3 mi) | 
| Basin size | 13 km2 (5.0 sq mi) | 
| Basin features | |
| Progression | Bicaz→ Bistrița→ Siret→ Danube→ Black Sea | 
The Cupaș is a left tributary of the river Bicaz in Romania. The lower reach of the river defines the border between Harghita and Neamț counties. Its length is 7 km (4.3 mi) and its basin size is 13 km2 (5.0 sq mi). It discharges into the Bicaz in the Bicaz Gorge, near the village Lacu Roșu.