Colorado Drainage Basins
Colorado encompasses the headwaters of several important rivers. The state is divided into two major hydrographic regions by the Continental Divide of the Americas. East of the Continental Divide, surface waters flow to the Gulf of Mexico, either via the Rio Grande or via one of several rivers (the South Platte River, the North Platte River, the Republican River, the Arkansas River, the Cimarron River, or the Canadian River) which eventually feed the Mississippi River along the way. West of the Continental Divide, surface waters flow via the Green River, the upper Colorado River (formerly the Grand River), or the San Juan River into the Colorado River and on to the Gulf of California.
Colorado also has three significant endorheic basins: the San Luis Closed Basin in the San Luis Valley, and the Bear Creek Basin and the White Woman Basin spanning the Colorado-Kansas border north and south of the Arkansas River.
List of major drainage basins
Basin | Outlet | Total Area | In-State Area | % In-State |
---|---|---|---|---|
Colorado River | Gulf of California | 271,481 mi |
703,132 km38,686 mi |
100,195 km14.2% |
Arkansas River | Mississippi River | 184,750 mi |
478,501 km27,036 mi |
70,022 km14.6% |
Rio Grande (Rio Bravo del Norte) | Gulf of Mexico | 176,555 mi |
457,275 km4,660 mi |
12,070 km2.6% |
Canadian River | Arkansas River | 47,375 mi |
122,701 km59 mi |
154 km0.1% |
Green River | Colorado River | 44,750 mi |
115,903 km10,556 mi |
27,340 km23.6% |
North Platte River | Platte River | 31,180 mi |
80,755 km1,980 mi |
5,129 km6.4% |
upper Colorado River (Grand River) | Colorado River | 26,252 mi |
67,993 km22,270 mi |
57,680 km84.8% |
San Juan River | Colorado River | 24,927 mi |
64,560 km5,859 mi |
15,175 km23.5% |
South Platte River | Platte River | 24,223 mi |
62,738 km18,899 mi |
48,948 km78.0% |
Smoky Hill River | Kansas River | 19,994 mi |
51,783 km963 mi |
2,493 km4.8% |
Cimarron River | Arkansas River | 17,332 mi |
44,890 km2,116 mi |
5,481 km12.2% |
Yampa River | Green River | 8,304 mi |
21,506 km5,903 mi |
15,289 km71.1% |
Gunnison River | upper Colorado River (Grand River) | 8,051 mi |
20,851 km8,051 mi |
20,851 km100% |
North Fork Republican River | Republican River | 5,086 mi |
13,172 km4,449 mi |
11,522 km87.5% |
White River | Green River | 5,015 mi |
12,989 km3,782 mi |
9,796 km75.4% |
Dolores River | upper Colorado River (Grand River) | 4,633 mi |
11,998 km4,100 mi |
10,619 km88.5% |
Laramie River | North Platte River | 4,618 mi |
11,961 km382 mi |
989 km8.3% |
Little Snake River | Yampa River | 4,104 mi |
10,629 km1,704 mi |
4,412 km41.5% |
Purgatoire River | Arkansas River | 3,445 mi |
8,923 km3,321 mi |
8,601 km96.4% |
Lodgepole Creek | South Platte River | 3,233 mi |
8,374 km191 mi |
496 km5.9% |
Rio Chama | Rio Grande | 3,168 mi |
8,204 km92 mi |
238 km2.9% |
San Luis Closed Basin | endorheic basin | 2,949 mi |
7,638 km2,949 mi |
7,638 km100% |
Frenchman Creek | Republican River | 2,856 mi |
7,398 km980 mi |
2,539 km34.3% |
South Fork Republican River | Republican River | 2,778 mi |
7,195 km2,106 mi |
5,454 km75.8% |
San Luis Creek | San Luis Closed Basin | 2,703 mi |
7,000 km2,703 mi |
7,000 km100% |
Cache la Poudre River | South Platte River | 1,915 mi |
4,959 km1,771 mi |
4,587 km92.5% |
Bear Creek Basin | endorheic basin | 1,890 mi |
4,896 km973 mi |
2,521 km51.5% |
Huerfano River | Arkansas River | 1,869 mi |
4,840 km1,869 mi |
4,840 km100% |
Big Sandy Creek | Arkansas River | 1,863 mi |
4,825 km1,863 mi |
4,825 km100% |
Bear Creek | Bear Creek Basin | 1,737 mi |
4,500 km965 mi |
2,500 km55.6% |
North Fork Cimarron River | Cimarron River | 1,723 mi |
4,462 km859 mi |
2,225 km49.9% |
Arikaree River | North Fork Republican River | 1,710 mi |
4,429 km1,647 mi |
4,265 km96.3% |
San Miguel River | Dolores River | 1,567 mi |
4,060 km1,567 mi |
4,060 km100% |
Stinking Water Creek | Frenchman Creek | 1,491 mi |
3,862 km373 mi |
966 km25.0% |
Roaring Fork River | upper Colorado River (Grand River) | 1,454 mi |
3,766 km1,454 mi |
3,766 km100% |
Crow Creek | South Platte River | 1,435 mi |
3,717 km850 mi |
2,201 km59.2% |
Horse Creek | Arkansas River | 1,421 mi |
3,680 km1,421 mi |
3,680 km100% |
Ladder Creek | Smoky Hill River | 1,407 mi |
3,645 km256 mi |
663 km18.2% |
Bijou Creek | South Platte River | 1,395 mi |
3,612 km1,395 mi |
3,612 km100% |
White Woman Basin | endorheic basin | 1,381 mi |
3,577 km351 mi |
908 km25.4% |
Rush Creek | Arkansas River | 1,378 mi |
3,570 km1,378 mi |
3,570 km100% |
Animas River | San Juan River | 1,375 mi |
3,562 km1,147 mi |
2,971 km83.4% |
Saguache Creek | San Luis Creek | 1,345 mi |
3,482 km1,345 mi |
3,482 km100% |
Montezuma Creek | San Juan River | 1,175 mi |
3,044 km380 mi |
983 km32.3% |
White Woman Creek | White Woman Basin | 1,158 mi |
3,000 km309 mi |
800 km26.7% |
Beaver Creek | South Platte River | 1,135 mi |
2,939 km1,135 mi |
2,939 km100% |
Uncompahgre River | Gunnison River | 1,128 mi |
2,921 km1,128 mi |
2,921 km100% |
Tomichi Creek | Gunnison River | 1,109 mi |
2,874 km1,109 mi |
2,874 km100% |
Apishapa River | Arkansas River | 1,080 mi |
2,798 km1,080 mi |
2,798 km100% |
Saint Vrain Creek | South Platte River | 993 mi |
2,572 km993 mi |
2,572 km100% |
Eagle River | upper Colorado River (Grand River) | 971 mi |
2,515 km971 mi |
2,515 km100% |
Vermillion Creek | Green River | 965 mi |
2,500 km446 mi |
1,155 km46.2% |
North Fork Gunnison River | Gunnison River | 962 mi |
2,492 km962 mi |
2,492 km100% |
Fountain Creek | Arkansas River | 933 mi |
2,418 km933 mi |
2,418 km100% |
Big Thompson River | South Platte River | 830 mi |
2,149 km830 mi |
2,149 km100% |
Two Butte Creek | Arkansas River | 814 mi |
2,107 km814 mi |
2,107 km100% |
Mancos River | San Juan River | 810 mi |
2,099 km762 mi |
1,973 km94.0% |
Conejos River | Rio Grande | 802 mi |
2,078 km568 mi |
1,471 km70.8% |
North Fork Smoky Hill River | Smoky Hill River | 759 mi |
1,965 km366 mi |
947 km48.2% |
Sidney Draw | South Platte River | 753 mi |
1,949 km142 mi |
368 km18.9% |
South Fork Beaver Creek | Beaver Creek | 749 mi |
1,939 km201 mi |
522 km26.9% |
Sand Arroyo Creek | North Fork Cimarron River | 748 mi |
1,938 km507 mi |
1,314 km67.8% |
Chico Creek | Arkansas River | 747 mi |
1,934 km747 mi |
1,934 km100% |
Kiowa Creek | South Platte River | 729 mi |
1,888 km729 mi |
1,888 km100% |
Pawnee Creek | South Platte River | 724 mi |
1,875 km724 mi |
1,875 km100% |
McElmo Creek | San Juan River | 711 mi |
1,842 km639 mi |
1,654 km89.8% |
Blue River | upper Colorado River (Grand River) | 683 mi |
1,770 km683 mi |
1,770 km100% |
Piedra River | San Juan River | 683 mi |
1,770 km683 mi |
1,770 km100% |
Piceance Creek | White River | 629 mi |
1,630 km629 mi |
1,630 km100% |
Little Beaver Creek | Beaver Creek | 619 mi |
1,602 km81 mi |
210 km13.1% |
Clear Creek | South Platte River | 578 mi |
1,497 km578 mi |
1,497 km100% |
Taylor River | Gunnison River | 486 mi |
1,258 km486 mi |
1,258 km100% |
Boulder Creek | Saint Vrain Creek | 448 mi |
1,160 km448 mi |
1,160 km100% |
Cherry Creek | South Platte River | 405 mi |
1,050 km405 mi |
1,050 km100% |
See also
- Surface-water hydrology
- Bibliography of Colorado
- Geography of Colorado
- History of Colorado
- Index of Colorado-related articles
- List of Colorado-related lists
- Outline of Colorado
Notes
- ^ The Colorado River did not officially flow through the State of Colorado until July 25, 1921. Prior to that date, the origin of the Colorado River was officially the confluence of the Grand and Green rivers at 38°11′21″N 109°53′09″W / 38.1892°N 109.8857°W in what is now Canyonlands National Park of Utah. In 1921, U.S. Representative Edward T. Taylor of Colorado petitioned the Congressional Committee on Interstate and Foreign Commerce to rename the Grand River as the Colorado River. On July 25, 1921, President Warren G. Harding signed House Joint Resolution 32 - To change the name of the Grand River in Colorado and Utah to the Colorado River, over the objections of representatives from Wyoming, Utah, and the United States Geological Survey, who noted that the Green River was longer and had a larger drainage basin, although the Grand River often contributed a greater flow of water.
- ^ The summit of Uncompahgre Peak at 14,321 feet (4365.0 m) is the highest point in the drainage basins of the Cimarron River, the Gunnison River, the former Grand River, the Colorado River, and the Gulf of California.
- ^ The summit of Mount Elbert at 14,440 feet (4401.2 m) is the highest point in the drainage basins of the Arkansas River and the Mississippi River.
- ^ The summit of Blanca Peak at 14,351 feet (4374 m) is the highest point in the drainage basin of the Rio Grande (Rio Bravo del Norte).
- ^ The headwaters of the Green River are located in the Wind River Mountains of the State of Wyoming.
- ^ The summit of Clark Peak at 12,960 feet (3950 m) is the highest point in the drainage basins of the Laramie River and the North Platte River.
- ^ The summit of Mount Lincoln at 14,293 feet (4356.5 m) is the highest point in the drainage basins of the South Platte River, the Platte River, and the Missouri River.
- ^ The headwaters of the Cimarron River are located in Union County, New Mexico, a short distance south of the Colorado border.
- ^ The Gunnison River Basin is the most extensive river basin exclusively within the State of Colorado.
- ^ The summit of Culebra Peak at 14,053 feet (4283 m) is the highest point in the drainage basin of the Purgatoire River.
- ^ The San Luis Closed Basin is the most extensive endorheic basin in the State of Colorado.
- ^ The summit of Crestone Peak at 14,300 feet (4359 m) is the highest point in the San Luis Closed Basin.
- ^ The summit of Hagues Peak at 13,573 feet (4137 m) is the highest point in the drainage basins of the Cache la Poudre River and the Big Thompson River.
- ^ The summit of West Spanish Peak at 13,631 feet (4155 m) is the highest point in the drainage basins of the Huerfano River and Apishapa River.
- ^ The point at which the Arikaree River flows out of the Colorado and into Kansas is the lowest point in the State of Colorado at 3317 feet (1011 m).
- ^ The summit of Castle Peak at 14,279 feet (4352.2 m) is the highest point in the drainage basins of the Roaring Fork River and the Taylor River.
- ^ The summit of Longs Peak at 14,259 feet (4346 m) is the highest point in the drainage basin of Saint Vrain Creek.
- ^ The summit of Pikes Peak at 14,115 feet (4302.31 m) is the highest point in the drainage basin of Fountain Creek.
- ^ The summit of Grays Peak at 14,278 feet (4352 m) is the highest point on the Continental Divide in North America and the drainage basins of the Blue River and Clear Creek.
References
- ^ "Renaming the Grand River, Colo." (PDF), Hearing Before the Committee on Interstate and Foreign Commerce of the House of Representatives, Sixty Sixth Congress, Third Session, on HJ 460, Government Printing Office, February 18, 1921, retrieved May 16, 2023
- ^ "House Joint Resolution 32 - To change the name of the Grand River in Colorado and Utah to the Colorado River" (PDF). Congressional Record. Sixty-seventh United States Congress. July 25, 1921. p. 4274. Retrieved May 29, 2023.
- ^ Gustafson, Daniel L. (2003-01-24). "Hydrologic Unit Project". Montana State University, Environmental Statistics Group. Archived from the original on 2012-02-10. Retrieved 2008-02-05.
- ^ Murphy, Sheila F. (2006). State of the watershed: Water quality of Boulder Creek, Colorado (PDF). U.S. Geological Survey Circular 1284. U.S. Department of the Interior, U.S. Geological Survey. ISBN 1-4113-0954-5. Retrieved 2008-02-05.