Bumping River

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Bumping River
none
Country United States
State Washington
Region Yakima County
Length 25 mi (40 km) [1]
Discharge at Bumping Lake Dam
 - average 282 cu ft/s (8 /s) [2]
Source Cascade Range
 - coordinates 46°45′34″N 121°26′19″W / 46.75944, -121.43861 [1]
 - elevation 4,155 ft (1,266 m) [3]
Mouth Naches River
 - coordinates 46°59′18″N 121°5′38″W / 46.98833, -121.09389 [1]
 - elevation 2,555 ft (779 m) [3]
Major tributaries
 - left American River

The Bumping River is a tributary of the Naches River, in Washington in the United States. It flows down the east side of the Cascade Range, through Wenatchee National Forest and the William O. Douglas Wilderness. From its source at Fish Lake near Crag Mountain, it flows northeast to Bumping Lake, a natural lake enlarged and regulated by Bumping Lake Dam. Below the dam, the Bumping River continues flowing northeast. It is joined by the American River, its main tributary, a few miles above its mouth where it joins the Little Naches River to form the Naches River.

Bumping River is part of the Columbia River basin, being a tributary of the Naches River, which is tributary to the Yakima River, which is tributary to the Columbia River.

Variant names listed by the USGS for the Bumping River include Tancum River and Tanum River.[1]

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