Hat Rock State Park

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Hat Rock State Park
Hat Rock
Hat Rock State Park is located in Oregon
Hat Rock State Park
Type Public, state
Location Umatilla County, Oregon
Nearest city Hermiston
Coordinates 45°54′53″N 119°09′54″W / 45.9148548°N 119.1650109°W / 45.9148548; -119.1650109Coordinates: 45°54′53″N 119°09′54″W / 45.9148548°N 119.1650109°W / 45.9148548; -119.1650109[1]
Operated by Oregon Parks and Recreation Department

Hat Rock State Park is a state park in the U.S. state of Oregon, administered by the Oregon Parks and Recreation Department. The park is located off the east side of U.S. Highway 730 in Hermiston,[2] on the south shore of Lake Wallula behind McNary Dam on the Columbia River.[3]

Flood basalt[edit]

Anchor, a landmark in the Park

Hat Rock is a geological formation that, along with another outcropping rock in the park called Boat Rock, are thought to be exposed remnants of a 12-million-year-old basalt flow. Floods from the Ice Age eventually left these bedrocks, as well as others along the Columbia River Gorge exposed at the surface of the Earth.[4] It is 70 feet (21 meters) high.

See also[edit]


  1. ^ "Hat Rock State Park". Geographic Names Information System. United States Geological Survey. Retrieved 2011-06-21. 
  2. ^ Fanselow, Julie (2003). Traveling the Lewis and Clark Trail. Falcon. p. 252. ISBN 0-7627-2589-3. 
  3. ^ "McNary Dam and Lake Wallula". U.S. Army Corps of Engineers. Retrieved July 18, 2014. 
  4. ^ Bannan., Jan Gumprecht (2002). Oregon State Parks. Mountaineers Books. p. 212. ISBN 0-89886-794-0. 

External links[edit]