Marys River (Oregon)

Marys River
Marys River near mouth in Corvallis
Location of the mouth of Marys River in Oregon
EtymologyUncertain. For one of at least two women named Mary.
Location
CountryUnited States
StateOregon
CountyBenton
Physical characteristics
SourceConfluence of East Fork Marys River and West Fork Marys River
  locationnear Summit, Benton County, Oregon
  coordinates44°39′24″N 123°33′39″W / 44.65667°N 123.56083°W / 44.65667; -123.56083
  elevation659 ft (201 m)
MouthWillamette River
  location
Corvallis, Benton County, Oregon
  coordinates
44°33′20″N 123°15′41″W / 44.55556°N 123.26139°W / 44.55556; -123.26139
  elevation
207 ft (63 m)
Length40 mi (64 km)
Basin size310 sq mi (800 km2)
Discharge 
  location2 miles (3.2 km) southeast of Philomath, 9.4 miles (15.1 km) from the mouth
  average448 cu ft/s (12.7 m3/s)
  minimum0.60 cu ft/s (0.017 m3/s)
  maximum13,600 cu ft/s (390 m3/s)

Marys River is a 40-mile (64 km) tributary of the Willamette River in the U.S. state of Oregon. From its source at the confluence of its east and west forks near Summit, it flows generally southeast from the Central Oregon Coast Range to Corvallis.