Colorado drainage basins Table of major drainage basins Major Drainage Basins of the State of Colorado

| Basin | Outlet | Total_Area | In_State_Area | _In_State |
|---|---|---|---|---|
| North Fork Cimarron River | Cimarron River | 031 4,462km 2 1,723mi 2 | 043 2,225km 2 859mi 2 | A049 49.9% |
| Arikaree River | North Fork Republican River | 032 4,429km 2 1,710mi 2 | 023 4,265km 2 1,647mi 2 | A032 96.3% |
| San Miguel River | Dolores River | 033 4,060km 2 1,567mi 2 | 024 4,060km 2 1,567mi 2 | A006 100% |
| Stinking Water Creek | Frenchman Creek | 034 3,862km 2 1,491mi 2 | 063 966km 2 373mi 2 | A058 25.0% |
| Roaring Fork River | upper Colorado River ( GrandRiver ) | 035 3,766km 2 1,454mi 2 | 025 3,766km 2 1,454mi 2 | A007 100% |
| Crow Creek | South Platte River | 036 3,717km 2 1,435mi 2 | 044 2,201km 2 850mi 2 | A046 59.2% |