| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Crowsnest River |  | Oldman River | 53,000 | 49.5997222222 | -114.0491666667 | Map | |||||
| Belly River |  | 3,849,999,872 | 1,570 | Oldman River | 204,000 | 49.7688000000 | -113.0360000000 | Map | |||
| Little Bow River | Oldman River | 190,000 | 49.8881000000 | -112.4750000000 | Map | ||||||
| St. Mary River (Alberta–Montana) |  | 3,700,000,000 | Oldman River | 200,000 | 49.6272000000 | -112.8870000000 | Map |