Similkameen River
The Similkameen River runs through southern British Columbia, Canada, eventually discharging into the Okanagan River near Oroville, Washington, in the United States. The river is about 197 km (122 mi) long, with a drainage basin area of 7,600 km2 (2,900 sq mi). The river is said to be named for an indigenous people called <Similkameigh>, meaning "treacherous waters".
It starts on the east flank of Manning Park, about 10.3 km (6.4 mi) north of Allison Pass and flows past the settlements of East Gate, Princeton, Hedley, Keremeos, and Cawston, closely followed by Highway 3, the Crowsnest Highway. About 25 km (16 mi) upstream from Princeton, the river drops over Similkameen Falls. Numerous viewpoints of the river occur from the highway, the most popular being Bromley Rock, where swimming in the river from a spectacular sandy beach is possible, although the water is very cold. It contributes 75% of the flow of the Okanogan River and crosses the international border at Nighthawk, Washington.
The United States Geological Survey maintains a stream gauge at river mile 15.8, just upstream from the Oroville–Tonasket Irrigation District canal intake. The river's discharge (flow) at this point averages 2,283 cubic feet per second (64.6 m3/s), with a recorded maximum of 45,800 cu ft/s (1,300 m3/s) and minimum of 65 cu ft/s (1.8 m3/s).
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