It is part of a larger agriculture research center belonging to the Oregon State University .
The Claire Hanley Arboretum was first planted in 1962 by Claire and Mary Hanley , two sisters raised on the historic Michael Hanley Farmstead along present - day Oregon Route 238 .
Claire Hanley Arboretum is part of a larger agriculture research center belonging to the Oregon State University .
The Claire Hanley Arboretum was first planted in 1962 by Claire and Mary Hanley , two sisters raised on the historic Michael Hanley Farmstead along present - day Oregon Route 238 .