Williamson River
| Williamson River | ||
 The Williamson River and its tributaries |
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| Data | ||
| Water code | US : 1152398 | |
| location | Klamath County , Oregon , USA | |
| River system | Klamath River | |
| Drain over | Upper Klamath Lake → Link → Klamath → Pacific | |
| source | Fuego Mountain in Klamath County 42 ° 42 ′ 15 ″ N , 121 ° 20 ′ 24 ″ W |
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| muzzle |
Upper Klamath Lake Coordinates: 42 ° 27 '53 " N , 121 ° 57' 25" W 42 ° 27 '53 " N , 121 ° 57' 25" W.
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| length | 120 km | |
| Catchment area | 7800 km² | |
| Left tributaries | Sprague River | |
The Williamson River is a river in southwestern Oregon, about 120 kilometers long . Together with its tributary Sprague River , it forms the main tributary of Upper Klamath Lake .
The Williamson River rises on the north slope of Fuego Mountain in central Klamath County . The source is about 40 miles northeast of the town of Klamath Falls . The river initially flows in a northerly direction through mountains and later through a rather flat landscape. The Williamson River and Sprague River converge near the town of Chiloquin , before flowing into Upper Klamath Lake at Modoc Point. The site is visible from US Highway 97 . The environmental organization The Nature Conservancy acquired part of the swampy land where the river flows. The organization designated the delta as a resting area for migratory birds .
In the agricultural valley north of Upper Klamath Lake, a trench irrigation system was created to irrigate the fields. These are fed with water from the Williamson River.