Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Metolius River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Metolius River, the highest being situated at an altitude of ft, the .

The Metolius River is a tributary of the Deschutes River in central Oregon, USA. It is approximately 28 miles long and originates from a natural spring that produces over 50,000 gallons of water per minute. The river's hydrology is unique because it flows entirely from underground sources, resulting in very clear and cold water. The river has no dams or reservoirs, and it is mainly used for recreational activities such as fishing, camping, and hiking. The surrounding area is also popular for agriculture, particularly for growing hay and raising cattle. The Metolius River is considered an important habitat for fish, including salmon and trout, and it has a rich history of native American culture and early European exploration.