Discovered in the 1920s when local cowboys picked up the handy orange-sized rocks to get the attention of their cows, thundereggs are still being uncovered in large quantities on Richardson's Rock ...

For nearly half a century, the Richardson family has been a rock for central Oregon. Their Richardson's Rock Ranch has long been one of Oregon's best roadside attractions, just off U.S. 97 in the ...

For nearly half a century, the Richardson family has been a rock for Central Oregon. The family’s Richardson’s Rock Ranch has long been one of Oregon’s best roadside attractions, just off U.S. Highway ...

Cut thundereggs from one of the Priday beds are on display in the rock shop. Richardson’s Rock Ranch — with its colorful, agate-filled nodules known as thundereggs — is rich in geologic history. And ...