| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Arun River (China–Nepal) |  | 33,578,000,384 | Koshi river | 250,000 | 26.9130555556 | 87.1569444444 | Map | ||||
| Bagmati River |  | 14,384,000,000 | Koshi river | 589,000 | 27.6525000000 | 85.2897200000 | Map | ||||
| Bhotekoshi River |  | Koshi river | 27.7120000000 | 85.7650000000 | Map | ||||||
| Sunkoshi River |  | 18,800,001,024 | Koshi river | 430,000 | 26.9104366300 | 87.1617507900 | Map | ||||
| Tamur River |  | 6,102,000,128 | Koshi river | 180,000 | 26.9130000000 | 87.1570000000 | Map |