The Incomappleux River is a major tributary of the Columbia River in British Columbia, Canada, entering that river via the Beaton Arm of Upper Arrow Lake. The upper reaches of the river valley are home to a portion of the only inland temperate rainforest in the world.

Incomappleux River
The inland temperate rainforest of the Incomappleux River Valley
Location in British Columbia
Location
Country	Canada
Province	British Columbia
District	Kootenay Land District
Physical characteristics
Source	Illecillewaet Neve
• location	Selkirk Mountains
Mouth	Columbia River
• location	Upper Arrow Lake
• coordinates	50°45′N 117°43′W[1]
Basin size	1,020 km2 (390 sq mi)[2]
Discharge
• location	near Beaton[2]
• average	55.8 m3/s (1,970 cu ft/s)[2]
• minimum	4.76 m3/s (168 cu ft/s)
• maximum	570 m3/s (20,000 cu ft/s)
Basin features
Progression	Incomappleux Valley

First Nations

The name "Incomappleux" is derived from the Okanagan word nk'mapeleqs, meaning "point at end (of lake)". This refers to the northeastern tip of Upper Arrow Lake into which the Incomappleux River empties. The names of the creek and adjacent mountain are also derived from this word. A Sinixt village by this name formerly existed somewhere in the confluence area.[3]

European settlement

Early explorers referred to the valley and river as various English spellings of the word, but Fish River was also used.[3]

Course

The river's course is nearly due south from its origin in the Selkirk Mountains at the southwest toe of the Illecillewaet Neve on Mount Bonney, which is on the south side of the Rogers Pass and is also the source of the Illecillewaet River.

See also

• Glacier National Park

References

External links

• Media related to Incomappleux River at Wikimedia Commons

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