River
Green River
1,175 km from source to mouth · United States.
United StatesFlows into Colorado River
In numbers
Length
1,175km
Average flow
170m³/s
Basin
124,578km²
Drop
1,239m
from 2,429 m to 1,190 m
Country
1
The journey
From source to mouth
1,175 km of river and 22 stops on the way: 2 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmWind River Rangeat 2,429 m
- 10 kmGreen River Lakes0.5 km²
- 99 kmFort Bonneville
- 127 kmENP Bridge over Green River
- 157 kmNew Fork Rivertributary
- 247 kmFontenelle Reservoir31 km²
- 254 kmETD Bridge over Green River
- 287 kmBig Sandy Rivertributary
- 301 kmETR Big Island Bridge
- 399 kmBlacks Forktributary
- 450 kmHenrys Forktributary
- 482 kmFlaming Gorge Reservoir127 km²
- 482 kmFlaming Gorge Dam
- 589 kmYampa Rivertributary
- 592 kmDenis Julien Inscription
- 661 kmJensen372 people
- 749 kmDuchesne Rivertributary
- 750 kmWhite Rivertributary
- 762 kmWillow Creektributary
- 880 kmDesolation Canyon
- 918 kmPrice Rivertributary
- 946 kmGreen River847 people
- 984 kmSan Rafael Rivertributary
- 1,175 kmColorado Riverat 1,190 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in Wyoming, Utah, and Colorado, in the United States, that is a tributary of the Colorado River
At the mouth it carries 173 m³/s on average: an Olympic pool every 14 seconds. It drops from 2,429 m to 1,190 m, 1.1 m per kilometre on average. Its basin covers 124,578 km², about the size of ER. 194,000 people live in it. Highest water: from April to June; lowest: from December to February and September. It is heavily dammed: reservoirs can hold 112% of a year's flow.
Where to start
- Green RiverLargest city on its banks · 847 people
- Canyonlands Regional Airport (CNY)Nearest airport with scheduled flights, 43 km from the cityCar hire at GJT airport (Grand Junction)Discover Cars · Affiliate link↗
- On the water44 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- Kayak and canoe50 put-ins and rapids mapped (OpenStreetMap)
- From June to SeptemberThe best months to visit
Green River, month by month
Highest water: from April to June
Lowest water: from December to February and September. Freezing months (average below −4 °C): from December to February. Best months to visit: from June to September.
From about 50 m³/s in the lowest month to 660 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.
Plan the trip
Plan the trip: boat trips, a bed by the river, a car
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
The basin
Green River: the basin in numbers
115,603 km² of land send their water to this river. This is what lives on it.
- 194,000people live in the basin
- 2/km²people per km²
- 2,167maverage altitude of the basin
- 327mmof rain a year (basin average)
- 4.8°Caverage air temperature
- 9%protected areas
- 0.4%covered by lakes
- 1%permafrost
- 7.2km³held in reservoirs
What covers the basin
- 34% Forest
- 4% Cropland
- 63% Pasture
RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.
Along the river
Green River: what you find on the way
- 12WeirsTusher Dam and 11 more
- 5WaterfallsOn-Off Falls and 4 more
- 50RapidsAnticipation Rapids, Little Steamboat Rapids, Bridge Rapids and 47 more
- 40Boat rampsFirehole Boat Ramp, Buckboard Marina Boat Ramp, Brinegar Crossing Boat Ramp and 37 more
- 2MarinasLucerne Valley Marina, Cedar Springs Marina
- 1River beachesSwasey's Beach
From OpenStreetMap, within 2.4 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
Green River in our other atlases
What our sister atlases know about the waterfalls on this river, the lakes it flows through, the beaches at its mouth, the mountains where it rises and the islands off its mouth.
3lakes on its wayLakeyas
62mountains at the sourcePeakyas
Lakes and reservoirs (3)
Lakes it flows through, by Lakeyas
- Green River Lakeskm 90.5km²
- Fontenelle Reservoirkm 21831km²
- Flaming Gorge Reservoirkm 426127km²
Lakeyas is coming soonOpen Lakeyas ↗
Mountains at the source (62)
Within 15 km of the source, by Peakyas
- Gannett Peak3.7 km away · prominence 2,157 m4,207m
- Mount Warren3.7 km away · prominence 293 m4,182m
- Fremont Peak5.4 km away · prominence 361 m4,190m
- Mount Helen3.3 km away · prominence 250 m4,151m
- Mount Sacagawea4.2 km away · prominence 125 m4,136m
- Mount Woodrow Wilson2.2 km away · prominence 153 m4,115m
- Turret Peak (Wyoming)4.4 km away · prominence 183 m4,145m
- Jackson Peak6.7 km away · prominence 219 m4,120m
54 more on PeakyasOpen Peakyas ↗
From space
The source and the mouth, seen from orbit
Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.
Photos
Green River in pictures
Tributaries
Where it flows, and what flows into it
It flows into
Colorado River
Mexico2,334 km640 m³/sTributaries (14)
Also: Yampa River, White River, Big Sandy River, Price River, Blacks Fork, Duchesne River, San Rafael River, Henrys Fork, Vermillion Creek, New Fork River, Willow Creek, Ashley Creek, Brush Creek, Tenmile Wash
Where these numbers come from
| Name, length, places | Wikidata (Q952429) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata |
| Flow | WaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0 |
| Climate along the river | WorldClim (RiverATLAS), 1970–2000 · CC BY 4.0 |
| Towns, bridges, dams | Wikidata · CC0; GeoNames · CC BY 4.0 |
| Along the river | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Our other atlases | Lakeyas, Peakyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; HydroLAKES · CC BY 4.0; NOAA OISST |
Every source and licence is on the data sources page.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.
beaches
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Every summit in 3D: summit weather, the 0 °C line, huts and trails.Visit 
waterfalls
Every waterfall: height, flow month by month and when it roars.Coming soonVisit 
islands
Every island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit 
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Every river from source to sea: the journey, the flow and the basin in numbers.You are here
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Every canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit