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River

Bear River

790 km from source to mouth · United States.

United StatesUnited StatesFlows into Great Salt Lake

Follow the riverMonth by month

SourceMouth
The river and every tributary in its basin, drawn from RiverATLAS (CC BY 4.0).

In numbers

Length

790km

Average flow

68m³/s

Basin

18,197km²

Drop

1,329m

from 2,608 m to 1,279 m

Country

1

The journey

From source to mouth

790 km of river and 6 stops on the way: 1 towns and cities on its banks, dams, bridges and the tributaries that feed it.

2,608 m1,279 m
Sourceat 2,608 m0 km
Woodruff Narrows Reservoir8.7 km²132 km
East Dingle Bridge339 km
Alexander Reservoir4.1 km²461 km
Oneida Narrows Reservoir1.4 km²543 km
Great Salt Lakeat 1,279 m790 km
0200400600790 km
  1. 0 kmSourceat 2,608 m
  2. 90 kmEvanston12,133 people
  3. 132 kmWoodruff Narrows Reservoir8.7 km²
  4. 339 kmEast Dingle Bridge
  5. 461 kmAlexander Reservoir4.1 km²
  6. 475 kmGrace Pegram Truss Railroad Bridge
  7. 543 kmOneida Narrows Reservoir1.4 km²
  8. 790 kmGreat Salt Lakeat 1,279 m

Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.

River in southwestern Wyoming, southeastern Idaho, and northern Utah in the United States

At the mouth it carries 68 m³/s on average: an Olympic pool every 37 seconds. It drops from 2,608 m to 1,279 m, 1.7 m per kilometre on average. Its basin covers 18,197 km², about the size of FJ. 190,000 people live in it. Highest water, with the snowmelt: from April to May; lowest: from December to March. Dams and reservoirs hold back a large share of its water (18% of a year's flow).

Read more on Wikipedia

Where to start

Bear River, month by month

Highest water: from April to May

Lowest water: from December to March. Freezing months (average below −4 °C): from December to February. Melting snow makes up much of its water. Best months to visit: from June to September.

12
-7°30 mmJan
12
-5°27 mmFeb
12
0°31 mmMar
140
5°36 mmApr
130
10°42 mmMay
120
15°34 mmJun
32
19°21 mmJul
25
18°24 mmAug
27
13°32 mmSep
34
7°30 mmOct
28
0°30 mmNov
20
-6°29 mmDec
Water (estimated flow)Air (average) Rain (mm)Best months

From about 12 m³/s in the lowest month to 140 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

Bear River: the basin in numbers

18,548 km² of land send their water to this river. This is what lives on it.

Heavily regulatedReservoirs can hold 18% of a year's flow: dams shape its seasons.
  • 190,000people live in the basin
  • 10/km²people per km²
  • 2,011maverage altitude of the basin
  • 414mmof rain a year (basin average)
  • 4.2°Caverage air temperature
  • 6%protected areas
  • 2.2%covered by lakes
  • 0.2km³held in reservoirs

What covers the basin

  • 46% Forest
  • 17% Cropland
  • 38% Pasture
  • 1% Towns and cities

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

Bear River: what you find on the way

  • 41DamsGrassy Lake Dam, Massae Dam, Myers Dam and 38 more
  • 1Weirs
  • 1Waterfalls
  • 21Boat rampsOneida Narrows Road and 20 more
  • 1MarinasCutler Canyon Marina

From OpenStreetMap, within 2.0 km of the river. Not mapped is not the same as not there.

Cross-checked with our atlases

Bear 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
  • 13mountains at the sourcePeakyas

Lakes and reservoirs (3)

Lakes it flows through, by Lakeyas

  1. Woodruff Narrows Reservoirkm 878.7km²
  2. Alexander Reservoirkm 3024.1km²
  3. Oneida Narrows Reservoirkm 3561.4km²

Lakeyas is coming soonOpen Lakeyas ↗

Mountains at the source (13)

Within 15 km of the source, by Peakyas

  1. Hayden Peak15 km away · prominence 351 m3,804m
  2. Kletting Peak12 km away · prominence 150 m3,671m
  3. Humpy Peak14 km away3,315m
  4. Ostler Peak14 km away
  5. The Cathedral15 km away
  6. A-1 Peak11 km away
  7. Deadman Mountain6.6 km away
  8. Gold Hill9.0 km away

5 more on PeakyasOpen Peakyas ↗

From space

The source and the mouth, seen from orbit

Bear River: satellite view of the source
The source14 km across
Bear River: satellite view of the mouth
The mouth19 km across

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.

Tributaries

Where it flows, and what flows into it

Tributaries (2)

Also: Little Bear River, Malad River

Where these numbers come from

Name, length, placesWikidata (Q813008) · CC0
Course, profile, basinRiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata
FlowWaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0
Climate along the riverWorldClim (RiverATLAS), 1970–2000 · CC BY 4.0
Towns, bridges, damsWikidata · CC0; GeoNames · CC BY 4.0
Along the river© OpenStreetMap contributors · ODbL
ImagesEOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons
Our other atlasesLakeyas, 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.

beachesCoastyaFind your beach: sea temperature, sun and swimming month by month.Visit
lakesLakeyasEvery lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit
mountainsPeakyasEvery summit in 3D: summit weather, the 0 °C line, huts and trails.Visit
waterfallsCascadyasEvery waterfall: height, flow month by month and when it roars.Coming soonVisit
islandsIslandyasEvery island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit
riversRiveryasEvery river from source to sea: the journey, the flow and the basin in numbers.You are here
canyonsCanyonyasEvery canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit