The Souris-Red-Rainy watershed (HUC-2 region 09) drains the Souris, Red, and Rainy Rivers of the northern Great Plains, flowing north into Canada and Hudson Bay. Covering 100,089 sq mi across 5 states and provinces, it is one of the 18 major drainage regions of the contiguous United States.
Use the interactive Souris-Red-Rainy watershed map below to explore all 4 HUC-4 sub-regions within the basin. Click any sub-region for its code, name, and area. Or view the interactive US watershed map to see all 18 major basins side by side.
Major Drainage Basins
Souris-Red-Rainy Watershed by the Numbers
- HUC-2 code: 09
- Total area: 100,089 sq mi
- States and provinces: CN, MN, MT, ND, SD
- HUC-4 sub-regions: 4
HUC-4 Sub-regions of the Souris-Red-Rainy Watershed
The USGS Watershed Boundary Dataset divides the Souris-Red-Rainy region into 4 HUC-4 sub-regions. Each sub-region drains into a distinct river system or coastal outlet within the larger basin:
| HUC-4 Code | Sub-region Name | Area (sq mi) |
|---|---|---|
| 0901 | Souris | 19,351 |
| 0902 | Red | 47,072 |
| 0903 | Rainy | 26,869 |
| 0904 | Saskatchewan River | 6,797 |
States and Provinces in the Souris-Red-Rainy Watershed
The Souris-Red-Rainy watershed spans 5 states and provinces: CN, MN, MT, ND, SD. Water falling anywhere within these boundaries ultimately drains through the Souris-Red-Rainy basin’s river network.
Frequently Asked Questions
What is the Souris-Red-Rainy watershed?
The Souris-Red-Rainy watershed is HUC-2 region 09 of the US Watershed Boundary Dataset. It drains the Souris, Red, and Rainy Rivers of the northern Great Plains, flowing north into Canada and Hudson Bay, covering 100,089 sq mi across CN, MN, MT, ND, SD.
How large is the Souris-Red-Rainy watershed?
The Souris-Red-Rainy watershed covers 100,089 square miles, making it one of the 18 major drainage regions of the contiguous United States.
How many sub-regions does the Souris-Red-Rainy watershed have?
The Souris-Red-Rainy watershed contains 4 HUC-4 sub-regions as defined by the USGS Watershed Boundary Dataset.
→ View all 18 major US watershed basins on the national interactive map
