The Dalles is the largest city and county seat of Wasco County, Oregon, United States. The name of the city comes from the French word dalle (meaning either "sluice" or "flagstone" and referring to the columnar basalt rocks carved by the river, what the French-Canadian employees of the North West Company called the now-inundated rapids of the Columbia River between the present-day city and Celilo Falls. The population was 12,156 at the 2000 census and was estimated at 12,314 in 2009. Also in the same area was the Petite Dalles or Little Dalles, or Short Narrows, which is now also inundated.... The site of what is now the city of The Dalles was a major Native American trading center for at least 10,000 years. The general area is one of the continent's most significant archaeological regions. Lewis and Clark camped near Mill Creek on October 25–27, 1805, and recorded the Native American name for the creek as Quenett. The first use of the name Dalles, according to Oregon Geographic Names, appears in fur trader Gabriel Franchère's Narrative, on April 12, 1814, referring to the long series of major rapids in the river.
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| County: | Wasco County |
| State: | Oregon |
| Country: | United States of America |
| Population: | 11,897 |
| Area: | 9 sq. mi. |
| Time zone: | Pacific Time Zone |
| Also known as: | The Dalles, Oregon, City of The Dalles, Wasco County / City of The Dalles city |