I discovered this barn while driving to another barn. Only after I photographed it did I learn that it’s actually in Marion County. The west side of Arndt Rd. is in Clackamas County, the east side is in Marion County, and this barn is on the east side. However, since I had already taken the pictures, I decided to keep them.
This barn is apparently owned by the nursery Smay Plants, which did not respond to an inquiry about the barn.