| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| East Branch Union River | Union River | 34,800 | 44.7315000000 | -68.3810000000 | Map | ||||||
| West Branch Union River | Union River | 32,000 | 44.7330000000 | -68.3860000000 | Map |