Bumping River

Bumping River
256px
Country	United States
State	Washington
Region	Yakima County
Tributaries
- left	American River
Source	Fish Lake (Yakima County, Washington)
- elevation	4,155 ft (1,266 m)
- coordinates
Mouth	Naches River
- elevation	2,555 ft (779 m)
- coordinates
Length	25 mi (40 km)
Discharge	for Bumping Lake Dam
- average	282 cu ft/s (8 m3/s)
Mouth of the Bumping River in Washington

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.

Stockmen said that the river's name was given because during a freshet heavy boulders were carried down the river creating a rumbling vibration as the rocks kept bumping together. Variant names listed by the USGS for the Bumping River include Tancum River and Tanum River.

See also

• List of rivers of Washington
• List of tributaries of the Columbia River

External links

• Bumping Lake Dam, United States Bureau of Reclamation

• Google Earth elevation for GNIS coordinates.
• U.S. Geological Survey Geographic Names Information System: Bumping River, USGS, GNIS.
• Major Storage Reservoirs, Yakima Project, United States Bureau of Reclamation.