Colorado drainage basins
Table of major drainage basins
Columns: Basin | Outlet | Total Area | In-State Area | % In-State
Colorado River | Gulf of California | 001 703,132km 2 271,481mi 2 | 001 100,195km 2 38,686mi 2 | A064 14.2% | Arkansas River | Mississippi River | 002 478,501km 2 184,750mi 2 | 002 70,022km 2 27,036mi 2 | A063 14.6% | Rio Grande | Gulf of Mexico | 003 457,275km 2 176,555mi 2 | 009 12,070km 2 4,660mi 2 | A072 2.6% | Canadian River | Arkansas River | 004 122,701km 2 47,375mi 2 | 073 154km 2 59mi 2 | A073 0.1% | Green River | Colorado River | 005 115,903km 2 44,750mi 2 | 005 27,340km 2 10,556mi 2 | A059 23.6% | North Platte River | Platte River | 006 80,755km 2 31,180mi 2 | 018 5,129km 2 1,980mi 2 | A068 6.4% | upper Colorado River ( GrandRiver ) | Colorado River | 007 67,993km 2 26,252mi 2 | 003 57,680km 2 22,270mi 2 | A038 84.8% | San Juan River | Colorado River | 008 64,560km 2 24,927mi 2 | 008 15,175km 2 5,859mi 2 | A060 23.5% | South Platte River | Platte River | 009 62,738km 2 24,223mi 2 | 004 48,948km 2 18,899mi 2 | A040 78.0% | Smoky Hill River | Kansas River | 010 51,783km 2 19,994mi 2 | 040 2,493km 2 963mi 2 | A070 4.8% | Cimarron River | Arkansas River | 011 44,890km 2 17,332mi 2 | 016 5,481km 2 2,116mi 2 | A066 12.2% | Yampa River | Green River | 012 21,506km 2 8,304mi 2 | 007 15,289km 2 5,903mi 2 | A043 71.1% | Gunnison River | upper Colorado River ( GrandRiver ) | 013 20,851km 2 8,051mi 2 | 006 20,851km 2 8,051mi 2 | A001 100% | North Fork Republican River | Republican River | 014 13,172km 2 5,086mi 2 | 010 11,522km 2 4,449mi 2 | A037 87.5% | White River | Green River | 015 12,989km 2 5,015mi 2 | 012 9,796km 2 3,782mi 2 | A042 75.4% | Dolores River | upper Colorado River ( GrandRiver ) | 016 11,998km 2 4,633mi 2 | 011 10,619km 2 4,100mi 2 | A036 88.5% | Laramie River | North Platte River | 017 11,961km 2 4,618mi 2 | 061 989km 2 382mi 2 | A067 8.3% | Little Snake River | Yampa River | 018 10,629km 2 4,104mi 2 | 022 4,412km 2 1,704mi 2 | A052 41.5% | Purgatoire River | Arkansas River | 019 8,923km 2 3,445mi 2 | 013 8,601km 2 3,321mi 2 | A031 96.4% | Lodgepole Creek | South Platte River | 020 8,374km 2 3,233mi 2 | 069 496km 2 191mi 2 | A069 5.9% | Rio Chama | Rio Grande | 021 8,204km 2 3,168mi 2 | 071 238km 2 92mi 2 | A071 2.9% | San Luis Closed Basin | endorheic basin | 022 7,638km 2 2,949mi 2 | 014 7,638km 2 2,949mi 2 | A002 100% | Frenchman Creek | Republican River | 023 7,398km 2 2,856mi 2 | 036 2,539km 2 980mi 2 | A053 34.3% | South Fork Republican River | Republican River | 024 7,195km 2 2,778mi 2 | 017 5,454km 2 2,106mi 2 | A041 75.8% | San Luis Creek | San Luis Closed Basin | 025 7,000km 2 2,703mi 2 | 015 7,000km 2 2,703mi 2 | A003 100% | Cache la Poudre River | South Platte River | 026 4,959km 2 1,915mi 2 | 021 4,587km 2 1,771mi 2 | A034 92.5% | Bear Creek Basin | endorheic basin | 027 4,896km 2 1,890mi 2 | 037 2,521km 2 973mi 2 | A048 51.5% | Huerfano River | Arkansas River | 028 4,840km 2 1,869mi 2 | 019 4,840km 2 1,869mi 2 | A004 100% | Big Sandy Creek | Arkansas River | 029 4,825km 2 1,863mi 2 | 020 4,825km 2 1,863mi 2 | A005 100% | Bear Creek | Bear Creek Basin | 030 4,500km 2 1,737mi 2 | 039 2,500km 2 965mi 2 | A047 55.6% | 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% | Horse Creek | Arkansas River | 037 3,680km 2 1,421mi 2 | 026 3,680km 2 1,421mi 2 | A008 100% | Ladder Creek | Smoky Hill River | 038 3,645km 2 1,407mi 2 | 067 663km 2 256mi 2 | A062 18.2% | Bijou Creek | South Platte River | 039 3,612km 2 1,395mi 2 | 027 3,612km 2 1,395mi 2 | A009 100% | White Woman Basin | endorheic basin | 040 3,577km 2 1,381mi 2 | 065 908km 2 351mi 2 | A057 25.4% | Rush Creek | Arkansas River | 041 3,570km 2 1,378mi 2 | 028 3,570km 2 1,378mi 2 | A010 100% | Animas River | San Juan River | 042 3,562km 2 1,375mi 2 | 030 2,971km 2 1,147mi 2 | A039 83.4% | Saguache Creek | San Luis Creek | 043 3,482km 2 1,345mi 2 | 029 3,482km 2 1,345mi 2 | A011 100% | Montezuma Creek | San Juan River | 044 3,044km 2 1,175mi 2 | 062 983km 2 380mi 2 | A054 32.3% | White Woman Creek | White Woman Basin | 045 3,000km 2 1,158mi 2 | 066 800km 2 309mi 2 | A056 26.7% | Beaver Creek | South Platte River | 046 2,939km 2 1,135mi 2 | 031 2,939km 2 1,135mi 2 | A012 100% | Uncompahgre River | Gunnison River | 047 2,921km 2 1,128mi 2 | 032 2,921km 2 1,128mi 2 | A013 100% | Tomichi Creek | Gunnison River | 048 2,874km 2 1,109mi 2 | 033 2,874km 2 1,109mi 2 | A014 100% | Apishapa Creek | Arkansas River | 049 2,798km 2 1,080mi 2 | 034 2,798km 2 1,080mi 2 | A015 100% | Saint Vrain Creek | South Platte River | 050 2,572km 2 993mi 2 | 035 2,572km 2 993mi 2 | A016 100% | Eagle River | upper Colorado River ( GrandRiver ) | 051 2,515km 2 971mi 2 | 038 2,515km 2 971mi 2 | A017 100% | Vermillion Creek | Green River | 052 2,500km 2 965mi 2 | 059 1,155km 2 446mi 2 | A051 46.2% | North Fork Gunnison River | Gunnison River | 053 2,492km 2 962mi 2 | 041 2,492km 2 962mi 2 | A018 100% | Fountain Creek | Arkansas River | 054 2,418km 2 933mi 2 | 042 2,418km 2 933mi 2 | A019 100% | Big Thompson River | South Platte River | 055 2,149km 2 830mi 2 | 045 2,149km 2 830mi 2 | A020 100% | Two Butte Creek | Arkansas River | 056 2,107km 2 814mi 2 | 046 2,107km 2 814mi 2 | A021 100% | Mancos River | San Juan River | 057 2,099km 2 810mi 2 | 047 1,973km 2 762mi 2 | A033 94.0% | Conejos River | Rio Grande | 058 2,078km 2 802mi 2 | 056 1,471km 2 568mi 2 | A044 70.8% | North Fork Smoky Hill River | Smoky Hill River | 059 1,965km 2 759mi 2 | 064 947km 2 366mi 2 | A050 48.2% | Sidney Draw | South Platte River | 060 1,949km 2 753mi 2 | 070 368km 2 142mi 2 | A061 18.9% | South Fork Beaver Creek | Beaver Creek | 061 1,939km 2 749mi 2 | 068 522km 2 201mi 2 | A055 26.9% | Sand Arroyo Creek | North Fork Cimarron River | 062 1,938km 2 748mi 2 | 057 1,314km 2 507mi 2 | A045 67.8% | Chico Creek | Arkansas River | 063 1,934km 2 747mi 2 | 048 1,934km 2 747mi 2 | A022 100% | Kiowa Creek | South Platte River | 064 1,888km 2 729mi 2 | 049 1,888km 2 729mi 2 | A023 100% | Pawnee Creek | South Platte River | 065 1,875km 2 724mi 2 | 050 1,875km 2 724mi 2 | A024 100% | McElmo Creek | San Juan River | 066 1,842km 2 711mi 2 | 053 1,654km 2 639mi 2 | A035 89.8% | Blue River | upper Colorado River ( GrandRiver ) | 067 1,770km 2 683mi 2 | 051 1,770km 2 683mi 2 | A025 100% | Piedra River | San Juan River | 068 1,770km 2 683mi 2 | 052 1,770km 2 683mi 2 | A026 100% | Piceance Creek | White River | 069 1,630km 2 629mi 2 | 054 1,630km 2 629mi 2 | A027 100% | Little Beaver Creek | Beaver Creek | 070 1,602km 2 619mi 2 | 072 210km 2 81mi 2 | A065 13.1% | Clear Creek | South Platte River | 071 1,497km 2 578mi 2 | 055 1,497km 2 578mi 2 | A028 100% | Taylor River | Gunnison River | 072 1,258km 2 486mi 2 | 058 1,258km 2 486mi 2 | A029 100% | Boulder Creek | Saint Vrain Creek | 073 1,160km 2 448mi 2 | 060 1,160km 2 448mi 2 | A030 100% | Cherry Creek | South Platte River | 073 1,050km 2 405mi 2 | 060 1,050km 2 405mi 2 | A030 100%