River Erriff

River Erriff
Aasleagh Falls on the Erriff
Native nameAbhainn na hOirimhe (Irish)
Physical characteristics
Source 
  locationGlennacally
Mouth 
  location
Atlantic Ocean at Killary Harbour
Length33.0 km (20.5 mi)
Basin size163 km2 (63 sq mi)
Discharge 
  average8.16 m3/s (288 cu ft/s)

The River Erriff (Irish: Abhainn na hOirimhe) is a river in Ireland, flowing through County Mayo. A spate river, it is characterised by lively streams and deep fish-holding pools. A waterfall called Aasleagh Falls (Irish: Eas Liath, meaning 'grey waterfall') is near the mouth of the river.