From the record
“The Santiam Wagon Road was a freight route in the U.S. state of Oregon between the Willamette Valley and Central Oregon regions from 1865 to the 1930s. It is considered one of the most important historical routes in the state.”
Wikipedia article Santiam Wagon Road, CC BY-SA 4.0.
One of 73 National Register listings published here for Linn County · listed in 2010 · category: District.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service