| Wallula Gap | |
|---|---|
 View from northeast in 2008, from Main Street in Wallula | |
  Location in the United States  Location in Washington | |
| Location | Columbia River Basin, Washington, U.S. |
| Nearest city | Kennewick |
| Coordinates | 46°02′40″N 118°56′48″W / 46.04444°N 118.94667°W |
| Designated | 1980 |
Wallula Gap (/wəˈluːlə/) is a large water gap of the Columbia River in the Northwestern United States, in Southeastern Washington. It cuts through the Horse Heaven Hills basalt anticlines in the Columbia River Basin, just south of the confluence of the Walla Walla and Columbia rivers.
The National Park Service has recognized the gap as a National Natural Landmark, as a site that provides an important illustration of the geological history of the United States.[1]
- ^ "National Registry of Natural Landmarks" (PDF). National Park Service. June 2009. Archived from the original (PDF) on 2011-05-16. Retrieved 2013-03-31.