Elk Rock Garden—home of the Hardy Plant Society of Oregon offices—is a hillside estate in Dunthorpe, Oregon, with sweeping views of the Willamette River. The gardens were begun in 1916 by Peter Kerr on what was then a 13-acre property, shaped over decades into a richly layered landscape of trees, shrubs, perennials, and seasonal highlights.
The estate includes a manor house–inspired residence and other historic structures, and the grounds are open to the public—inviting visitors to explore winding paths, established plantings, and one of the Portland area’s most memorable river-view garden settings.
Magnolias and other native and non-native trees, shrubs, and plants grow in the gardens.