The ecoregion includes the mainstem Columbia north of the Snake River and tributaries such as the Yakima, Okanagan, Pend Oreille, Clark Fork, and Kootenay Rivers.

The four largest that empty directly into the Columbia ( measured either by discharge or by size of watershed ) are the Snake River ( mostly in Idaho ), the Willamette River ( in northwest Oregon ), the Kootenay River ( mostly in British Columbia ), and the Pend Oreille River ( mostly in northern Washington and Idaho, also known as the lower part of the Clark Fork ).

Pend Oreille mine, Pend Oreille County, Washington.

* Pend Oreille County, Washington-east

* Little Pend Oreille National Wildlife Refuge ( part )

Pend Oreille County ( ) is a county located in the U. S. state of Washington.

Pend Oreille County was created out of Stevens County on March 1, 1911.

* Little Pend Oreille National Wildlife Refuge ( part )

Pend Oreille County Historical Museum, Newport, Washington | Newport.

* National Register of Historic Places listings in Pend Oreille County, Washington

de: Pend Oreille County

es: Condado de Pend Oreille

eo: Kantono Pend Oreille ( Vaŝingtonio )

fr: Comté de Pend Oreille

it: Contea di Pend Oreille

nl: Pend Oreille County

no: Pend Oreille County

nds: Pend Oreille County

pl: Hrabstwo Pend Oreille

pt: Condado de Pend Oreille

ro: Comitatul Pend Oreille, Washington

The watershed of the Pend Oreille in the Newport-Oldtown area is extremely limited, due to a small depression of no more than, which begins one-half mile to the west and south of the river.

The largest river by volume in Montana, it drains an extensive region of the Rocky Mountains in western Montana and northern Idaho in the watershed of the Columbia River, flowing northwest through a long mountain valley and emptying into Lake Pend Oreille in northern Idaho.

Approximately 8 mi ( 13 km ) west of the Idaho-Montana state line, the river enters the eastern end of Lake Pend Oreille, near the town of Clark Fork.

The river is sometimes considered as one with the Clark Fork, which is the primary river flowing into Lake Pend Oreille.

Native people who lived along the river included the Pend d ' Oreilles and Kalispel ( considered as a single tribe by the Bureau of Indian Affairs ).

Both tribes lived around the area of Lake Pend Oreille occasionally ranging lower onto the Pend Oreille River ( or maybe they did have settlements along the river?

The Ktunaxa lived just to the east of the Pend Oreille river.

Sandpoint ( population 7, 000 ), near where the river flows out of Lake Pend Oreille, remains the largest city in close proximity to the river.

The river is part of the Columbia River drainage basin, as the Clark Fork is a tributary of the Pend Oreille River, a Columbia River tributary.

The Purcell Lobe of the Cordilleran Ice Sheet flowed south from Canada, carving the basin of present-day Lake Pend Oreille and damming the Clark Fork river.

The river flows into Lake Pend Oreille and is part of the Columbia River watershed via the Pend Oreille River.

Its headwaters originate in the Selkirk Mountains, and flow in a southerly direction to the river ’ s mouth at the northern tip of Lake Pend Oreille.

Bull trout, a threatened species, hatch in the upper river, and migrate the length of the river to grow upwards of 30 inches in Lake Pend Oreille before returning as adults to spawn again in the upper river.

This makes the Pend Oreille system the second longest tributary of the Columbia River ( after the Snake River ).

The Pend Oreille / Clark Fork system is notable in that it cuts right between the Bitterroot Range and Selkirk Range, two major chains of the Rocky Mountains.

Map showing dams in the Pend Oreille River watershed ( Clark Fork-Lake Pend Oreille-Pend Oreille system highlighted in blue )

Flathead Lake and Lake Pend Oreille are also fed by this system of rivers, as well as some man-made lakes on the Columbia River.

Afterwards he proceeded to establish trading posts throughout the region, including Kullyspell House on the north shore of Lake Pend Oreille.

Compared to the Columbia River above the two rivers ' confluence, the Pend Oreille-Clark-Flathead is nearly as long ( about 86 %), its basin about three-fourths as large ( 76 %), and its discharge over a third ( 37 %).

Newport was given its name in 1890 because it was selected as a landing site for the first steamboat on the Pend Oreille River.

The Pend Oreille River begins at Lake Pend Oreille in Bonner County, Idaho in the Idaho Panhandle, draining the lake from its western end near Sandpoint ( The Clark Fork River enters the lake from its eastern end ).

Some emigrants also settled along the Clark Fork, but there were similar problems because for most of its course, the Clark Fork, like the Pend Oreille, flows in a steep and narrow gorge.