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River

Allegheny River

523 km from source to mouth · United States.

United StatesUnited StatesFlows into Ohio River

Follow the riverMonth by month

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

In numbers

Length

523km

Average flow

560m³/s

Basin

29,992km²

Drop

291m

from 507 m to 216 m

Country

1

The journey

From source to mouth

523 km of river and 68 stops on the way: 30 towns and cities on its banks, dams, bridges and the tributaries that feed it.

507 m216 m
Allegheny Mountainsat 507 m0 km
Olean13,937 people81 km
Quaker Lake1.1 km²142 km
Allegheny Reservoir41 km²175 km
Tionesta Creektributary255 km
Pithole Creektributary275 km
Emlenton614 people360 km
Clarion Rivertributary369 km
Mahoning Creektributary427 km
Ohio Riverat 216 m523 km
0200400523 km
  1. 0 kmAllegheny Mountainsat 507 m
  2. 5 kmCoudersport2,381 people
  3. 81 kmOlean13,937 people
  4. 118 kmSalamanca5,929 people
  5. 142 kmQuaker Lake1.1 km²
  6. 175 kmAllegheny Reservoir41 km²
  7. 191 kmWarren9,404 people
  8. 196 kmConewango Creektributary
  9. 228 kmTidioute626 people
  10. 229 kmTidioute Bridge
  11. 254 kmTionesta428 people
  12. 255 kmTionesta Creektributary
  13. 275 kmPithole Creektributary
  14. 289 kmOil City Pennsylvania Railroad Bridge
  15. 290 kmOil City9,613 people
  16. 290 kmOil Creektributary
  17. 303 kmFrench Creektributary
  18. 303 kmFranklin6,077 people
  19. 360 kmEmlenton614 people
  20. 361 kmEmlenton Bridge
  21. 366 kmFoxburg181 people
  22. 366 kmFoxburg Bridge
  23. 369 kmClarion Rivertributary
  24. 395 kmSergeant Carl F. Curran II Bridge
  25. 396 kmEast Brady818 people
  26. 427 kmMahoning Creektributary
  27. 436 kmKittanning3,921 people
  28. 437 kmKittanning Citizens Bridge
  29. 439 kmJudge J. Frank Graff Bridge
  30. 442 kmFord City2,859 people
  31. 462 kmKiskiminetas Rivertributary
  32. 462 kmFreeport Rail Bridge
  33. 465 kmDonald R. Lobaugh Bridge
  34. 472 kmNatrona Heights10,927 people
  35. 475 kmBrackenridge3,211 people
  36. 477 kmGeorge D. Stuart Bridge
  37. 477 kmTarentum4,462 people
  38. 480 kmArnold4,772 people
  39. 482 kmNew Kensington12,170 people
  40. 483 kmLower Burrell11,761 people
  41. 486 kmSpringdale3,400 people
  42. 487 kmCheswick1,672 people
  43. 490 kmBessemer & Lake Erie Railroad Bridge
  44. 493 kmOakmont6,758 people
  45. 494 kmFox Chapel5,383 people
  46. 495 kmVerona2,492 people
  47. 495 kmPenn Hills44,610 people
  48. 497 kmBlawnox1,454 people
  49. 502 kmBrilliant Branch Railroad Bridge
  50. 503 kmHighland Park Bridge
  51. 503 kmOld Highland Park Bridge
  52. 504 kmSharpsburg3,398 people
  53. 505 kmSenator Robert D. Fleming Bridge
  54. 506 kmEtna3,401 people
  55. 508 kmMillvale3,376 people
  56. 509 kmPine Creektributary
  57. 509 kmWashington Crossing Bridge
  58. 510 km33rd Street Railroad Bridge
  59. 510 km31st Street Bridge
  60. 512 kmDavid McCullough Bridge
  61. 512 kmVeterans Bridge
  62. 512 kmAllegheny Aqueduct
  63. 512 kmFort Wayne Railroad Bridge
  64. 513 kmRachel Carson Bridge
  65. 513 kmAndy Warhol Bridge
  66. 513 kmRoberto Clemente Bridge
  67. 513 kmPittsburgh302,971 people
  68. 514 kmFort Duquesne Bridge
  69. 514 kmManchester Bridge
  70. 523 kmOhio Riverat 216 m

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

River in western Pennsylvania and New York, United States

At the mouth it carries 559 m³/s on average: an Olympic pool every 4.5 seconds. It drops from 507 m to 216 m, 0.6 m per kilometre on average. Its basin covers 29,992 km², about the size of AM. 1.4 million people live in it. Highest water: from April to May; lowest: from January to February. Dams and reservoirs hold back a large share of its water (13% of a year's flow).

Read more on Wikipedia

Where to start

  • PittsburghLargest city on its banks · 302,971 people
  • Pittsburgh International Airport (PIT)Nearest airport with scheduled flights, 20 km from the cityCar hire at PIT airport (Pittsburgh)Discover Cars · Affiliate link
  • On the water80 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
  • Kayak and canoe18 put-ins and rapids mapped (OpenStreetMap)
  • From May to SeptemberThe best months to visit

Allegheny River, month by month

Highest water: from April to May

Lowest water: from January to February. Freezing months (average below −4 °C): January. Best months to visit: from May to September.

560
-5°67 mmJan
230
-4°62 mmFeb
1,800
1°82 mmMar
2,100
8°89 mmApr
2,200
13°100 mmMay
1,400
18°115 mmJun
1,200
20°108 mmJul
1,200
19°101 mmAug
1,100
16°100 mmSep
1,100
10°82 mmOct
1,300
4°94 mmNov
880
-2°84 mmDec
Water (estimated flow)Air (average) Rain (mm)Best months

From about 230 m³/s in the lowest month to 2,200 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

Car hire at PIT airport (Pittsburgh)Discover CarsSee 

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

Allegheny River: the basin in numbers

30,247 km² of land send their water to this river. This is what lives on it.

Heavily regulatedReservoirs can hold 13% of a year's flow: dams shape its seasons.
  • 1.4millionpeople live in the basin
  • 47/km²people per km²
  • 491maverage altitude of the basin
  • 1,116mmof rain a year (basin average)
  • 7.8°Caverage air temperature
  • 1%protected areas
  • 0.6%covered by lakes
  • 2.4km³held in reservoirs

What covers the basin

  • 91% Forest
  • 12% Cropland
  • 3% Pasture
  • 2% 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

Allegheny River: what you find on the way

  • 11DamsKinzua Dam, Gatehouse, Tionesta Dam and 8 more
  • 14WeirsQuaker Run Dam, Dam No. 9, Dam No. 8 and 11 more
  • 8LocksLock Canal No. 9, Lock Canal No. 8, Lock Canal No. 7 and 5 more
  • 2WaterfallsPotters Falls, Freedom Falls
  • 1RapidsBucktooth Rapids
  • 17Canoe put-insTarentum Access, Springdale Access, Deer Creek Access and 14 more
  • 74Boat rampsAllegany State Park Boat Launch, Onoville Marina Park Boat Launch, Boat Launch and 71 more
  • 5MarinasOnoville Marina Park, Wolf Run Marina, Aspinwall Marina and 2 more
  • 1Boat rentalsKayak Pittsburgh Aspinwall
  • 1River beachesKinzua Beach

From OpenStreetMap, within 2.1 km of the river. Not mapped is not the same as not there.

Cross-checked with our atlases

Allegheny 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.

  • 2lakes on its wayLakeyas
  • 9mountains at the sourcePeakyas

Lakes and reservoirs (2)

Lakes it flows through, by Lakeyas

  1. Quaker Lakekm 1341.1km²
  2. Allegheny Reservoirkm 16541km²

Lakeyas is coming soonOpen Lakeyas ↗

Mountains at the source (9)

Within 15 km of the source, by Peakyas

  1. Greenman Hill12 km away
  2. Bailey Hill13 km away
  3. Carmer Hill8.1 km away
  4. Cobb Hill0.4 km away
  5. Ford Hill6.4 km away
  6. Lyon Hill9.8 km away
  7. Rag Hill6.0 km away
  8. Sweden Hill7.8 km away

1 more on PeakyasOpen Peakyas ↗

From space

The source and the mouth, seen from orbit

Allegheny River: satellite view of the source
The source14 km across
Allegheny River: satellite view of the mouth
The mouth24 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.

Photos

Allegheny River in pictures

Allegheny River Bend
Nyttend · Public domain
091317-FS-Allegheny-AJL-001 (37064287221)
usfs_Eastern_Region · Public domain
Allegheny Islands State Park
Clint · CC BY-SA 2.0
Allegheny Portage marker
Mwintermantel67 · CC BY-SA 4.0

Tributaries

Where it flows, and what flows into it

It flows into

Ohio RiverUnited StatesUnited States1,579 km8,000 m³/s

Tributaries (28)

Also: French Creek, Clarion River, Conewango Creek, Kiskiminetas River, Oil Creek, Tionesta Creek, Mahoning Creek, Pine Creek, Redbank Creek, Brokenstraw Creek, Pithole Creek, Kinzua Creek, Buffalo Creek, Bull Creek, Chartiers Run, Cowanshannock Creek, Crooked Creek, Deer Creek, East Sandy Creek, Girtys Run, Plum Creek, Potato Creek, Pucketa Creek, Rachel Carson Run

In the same basin

Mississippi RiverUnited StatesUnited States3,766 km12,700 m³/sMissouri RiverUnited StatesUnited States3,726 km2,500 m³/sArkansas RiverUnited StatesUnited States2,364 km240 m³/sTennessee RiverUnited StatesUnited States1,049 km2,000 m³/sRed RiverUnited StatesUnited States2,189 km1,900 m³/sYellowstone RiverUnited StatesUnited States1,114 km390 m³/sPlatte RiverUnited StatesUnited States500 km200 m³/sCanadian RiverUnited StatesUnited States1,458 km200 m³/sIllinois RiverUnited StatesUnited States432 km660 m³/sCumberland RiverUnited StatesUnited States1,107 km860 m³/s

Nearby

Rivers nearby

Monongahela RiverUnited StatesUnited States209 km360 m³/s0 km awayCuyahoga RiverUnited StatesUnited States137 km29 m³/s185 km awayShenandoah RiverUnited StatesUnited States241 km85 m³/s232 km awayKanawha RiverUnited StatesUnited States156 km430 m³/s255 km awayNiagara RiverCanadaCanada53 km5.8 m³/s325 km awayDetroit RiverUnited StatesUnited States45 km5.3 m³/s316 km awaySusquehanna RiverUnited StatesUnited States715 km1,100 m³/s348 km awaySt. Clair RiverUnited StatesUnited States65 km5,200 m³/s320 km away

Where these numbers come from

Name, length, placesWikidata (Q686021) · 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