The Williamson River of south-central Oregon in the United States is about 100 miles (160 km) long. It drains about 3,000 square miles (7,800 km2) east of the Cascade Range. Together with its principal tributary, the Sprague River, it provides over half the inflow to Upper Klamath Lake, the largest freshwater lake in Oregon. The lake's outlet is the Link River, which flows into Lake Ewauna and the Klamath River.The Williamson rises from a large spring in central Klamath County, on the north side of Fuego Mountain, in the Winema National Forest, about 40 miles (64 km) northeast of Klamath ... Source: Wikipedia
Maximum discharge on the river today is recorded at the Williamson River Blw Sprague River Nr Chiloquin with a streamflow rate of 615 cfs. This is also the deepest point on the Williamson River, reporting a gauge stage of 3.6 ft. This river is monitored from 2 different streamgauging stations along the Williamson River, the first of which is perched at an elevation of 4,494 ft, the Williamson River Near Klamath Agency .