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Colorado River Map (PDF) | Major Rivers & Lakes in Colorado

Written and Fact-checked by | Updated On: April 03, 2026 | 15:05 ET

Colorado River Map showing major rivers in Colorado, River start and end point, county boundaries.

River Map of Colorado State

Rivers and Waterways in Colorado

Colorado’s river systems begin high in the Rocky Mountains, where snowmelt feeds many of the major waterways across the western United States. Rivers in the state flow in multiple directions, with some draining west into the Colorado River system and eventually the Gulf of California, while others flow east toward the Mississippi River basin. Mountain streams dominate the landscape, especially in the central and western regions. Colorado also has numerous reservoirs and alpine lakes that are essential for water storage, irrigation, and supplying growing cities.

Major Rivers in Colorado

RiverLength (Approx.)RegionFlows Into
Colorado River1,450 miWestGulf of California
Arkansas River1,469 miCentralMississippi River
Rio Grande1,896 miSouthGulf of Mexico
South Platte River439 miNorthMissouri River
North Platte River716 miNorthMissouri River
Gunnison River180 miWestColorado River
Yampa River250 miNorthwestGreen River
San Juan River383 miSouthwestColorado River
Dolores River241 miSouthwestColorado River
White River195 miNorthwestGreen River
Animas River126 miSouthwestSan Juan River
Poudre River126 miNorthSouth Platte River
Blue River65 miCentralColorado River
Eagle River60 miCentralColorado River
Roaring Fork River70 miCentralColorado River
Uncompahgre River75 miWestGunnison River
Cache la Poudre River126 miNorthSouth Platte River
Big Thompson River78 miNorthSouth Platte River

Major Lakes in Colorado

LakeTypeRegion
Blue Mesa ReservoirReservoirWest
Lake GranbyReservoirNorth
Grand LakeNatural lakeNorth
Shadow Mountain LakeReservoirNorth
Horsetooth ReservoirReservoirNorth
Eleven Mile ReservoirReservoirCentral
Chatfield ReservoirReservoirCentral
Turquoise LakeReservoirCentral
Twin LakesNatural lakeCentral
Cherry Creek ReservoirReservoirCentral

Major River Basins in Colorado

Colorado is divided between major river basins that send water west toward the Colorado River and east toward the Mississippi River system. These basins are crucial for water supply across the western United States, making Colorado a key headwaters state.

  • Colorado River Basin
  • Arkansas River Basin
  • Rio Grande Basin
  • South Platte River Basin
  • North Platte River Basin
  • Gunnison River Basin
  • Yampa River Basin
  • San Juan River Basin
  • Dolores River Basin

Colorado Rivers Facts

StateColorado
Total Rivers & Streams158,000+ miles of streams
Major RiversColorado, Arkansas, Rio Grande, Platte
Total Waterway Length160,000+ miles
Main DrainageColorado River & Mississippi River Systems
Longest RiverRio Grande
Shortest RiverBlue River
Major River Basins9 Primary Basins
Primary OutletGulf of California & Gulf of Mexico
Key UsesWater supply, irrigation, recreation, hydroelectric power
Longest River Within StateArkansas River
Number of River Basins8–10 Major Basins
Major ReservoirsBlue Mesa, Lake Granby, Chatfield Reservoir
Primary Water SourceSnowmelt and mountain runoff