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Monongahela River in West Virginia

River62.1 mi

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Around Monongahela River

Monongahela River - Opekiska Pool1.2 miFriendship Hill National Historic Si…15.1 mi10 mi

Data Source: Recreation.gov · Public land: USGS PAD-US

About this river

Monongahela River is a 62.1 mile river. Streamflow is measured at the USGS gauge Monongahela River near Masontown, PA (site 03072655). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.

Typical flow by month

1939 to 2026

Monongahela River typically runs highest in March, at a median 12,500 cfs, and lowest in September, at 1,590 cfs. The highest flow on record for any single day is 154,000 cfs, in 1986.

Show the numbers
Typical flow by month at Monongahela River near Masontown, PA, in cfs
MonthTypical (cfs)Usual range (cfs)
January8,9904,510 to 16,600
February11,2006,030 to 19,600
March12,5007,480 to 21,200
April9,3805,200 to 17,000
May6,5103,290 to 12,400
June3,2951,700 to 6,525
July2,3301,320 to 4,630
August1,9101,120 to 3,940
September1,590961 to 2,750
October1,8901,180 to 3,340
November4,0702,210 to 8,050
December8,3304,290 to 14,500

Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 88 years of record. Statistics published by the US Geological Survey for Monongahela River near Masontown, PA (site 03072655). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.

Boat access nearby

8 mapped launches sit in the mapped area of Monongahela River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.

  • Fairmont State Route 310 BridgeMonongahela RiverPublic
  • PalatineMonongahela RiverPublic
  • Pricketts Fort State ParkMonongahela RiverPublic
  • Pricketts Fort State ParkMonongahela RiverPublic
  • Monongahela RiverMonongahela RiverPublic
  • MorgantownMonongahela RiverPublic
  • Edith B. Barill Riverfront ParkMonongahela RiverPublic
  • Sunset Harbor MarinaCheat LakePublic
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