COVID-19: For the latest information on COVID-19 in Oregon, visit the Oregon Health Authority. Resources for reopening and “Building a Safe and Strong Oregon” are available on Governor Brown’s website.
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Erratic Rock State Natural Site

  COVID-19 Alert 05/18/20
Park is open to limited daytime use. Bring your own water, food and hand sanitizer. Be prepared to turn around if crowded. Check our Park Status Map for a list of open parks and our FAQ page for details on this decision. 

Major Features & Activities

  • Blue Indicates that some, but not all, facilities are accessible.
Major Features & Activities:
  • Hiking Trails
  • Viewpoint
  • Exhibit Information

This 90-ton rock was deposited during an Ice Age flood. It floated over 500 miles in an iceberg 12,000 to 17,000 years ago,  by way of the Columbia River. When the ice melted, the rock was left behind. This is the largest glacial erratic found in the Willamette Valley. It is a type of rock not normally found in Oregon because it came from the Northern Rocky Mountains. Visitors at Erratic Rock can look out across the vast landscape and imagine the huge amount of water that filled the Willamette Valley during the Ice Age Floods.