Whidden–Kerr House and Garden

Elk Rock Gardens of the Bishop's Close are located on a hillside estate overlooking the Willamette River in Dunthorpe, Oregon, in the United States. Peter Kerr started the gardens in 1916 on a 13-acre (5.3 ha) estate that passed to the Episcopal Diocese of Oregon after his death in 1957. The private estate includes a manor house-inspired residence and other structures, and is open to visitors Monday - Friday, 8:00 am - 5:00pm.Magnolias and other native and non-native trees, shrubs, and plants grow in the gardens. Dunthorpe is an unincorporated community on the west side of the Willamette south of Portland and north of Lake Oswego along Oregon Route 43.

The Pierre Rossiter and Charlotte Hines House is a house located in Portland, Oregon listed on the National Register of Historic Places. Constructed in 1927, the house illustrates Colonial Revival architecture.

Dunthorpe is an unincorporated suburb of Portland, Oregon, United States. It is located just south of the Portland city limits and north of the Multnomah County line on the west side of the Willamette River. Lewis & Clark College, Tryon Creek State Park, and Lake Oswego are nearby. It has been designated as a Census Designated Place since 2020.

Elk Rock Island is an island on the Willamette River in the U.S. state of Oregon. The 12- to 13-acre (4.9- to 5.3-ha) island, formed 40 million years ago by a volcano, was given to Portland by Peter Kerr in 1940. The city of Milwaukie took ownership of the park in April 2016. The island is accessible via Spring Park.

The John V. G. Posey House, located in Portland, Multnomah County, Oregon, is listed on the National Register of Historic Places.

The Donald and Ruth McGraw House, located in the Dunthorpe neighborhood of Multnomah County, Oregon, just outside the Portland municipal boundary, is listed on the National Register of Historic Places. It was the home of the late Donald and Ruth McGraw.It was designed by architect Jamieson Parker.

Milwaukie Riverfront Park is an 8.5-acre (3.4 ha) park adjacent to downtown Milwaukie, Oregon, United States.

Kellogg Creek is a tributary, about 4.5 miles (7.2 km) long, of the Willamette River in the Portland metropolitan area of the U.S. state of Oregon. It begins near Lake Lenore in Johnson City and flows northwest to meet the river at Milwaukie. Kellogg Creek is joined about midway along its course by Mount Scott Creek, its major tributary, which enters the main stem near North Clackamas Central Park.Mount Scott Creek and its tributaries, Phillips and Dean creeks, drain the western flanks of Mount Scott. Kellogg Creek empties into the Willamette River slightly upstream of the mouth of Johnson Creek. This is about 18.5 miles (29.8 km) above the Willamette's confluence with the Columbia River, which in turn flows about another 100 miles (160 km) to the Pacific Ocean at Astoria.

Spring Park, or Spring Park Natural Area, is a public park in Milwaukie, Oregon, United States. The park opened in 2015 after two decades of planning and construction, and provides access to Elk Rock Island. The boundaries of the park have been disputed with neighbors.

The Percy A. Smith House is a historic house located in the unincorporated Dunthorpe neighborhood of Multnomah County, Oregon, just south of the Portland municipal boundary. It is listed on the National Register of Historic Places.

Berry Botanic Garden was a botanical garden in southwest Portland, Oregon, in the United States. In addition to large collections of alpine plants, rhododendrons, primulas, and lilies, it was known for its plant-conservation program and its large seed bank that protects rare or endangered plants of the Pacific Northwest. The seed bank, formally established in 1983, was thought to be the first in the U.S. that was devoted entirely to preserving rare native plants. The garden, created in the 1930s by Portland resident Rae Selling Berry, was bought after her death in 1976 by The Friends of Berry Botanic Garden, a nonprofit corporation. Managed by a board of directors, the Berry estate had an area of 6.5 acres (26,000 m2), and contained the largest public rock garden on the West Coast.In January 2010, The Berry Botanic Garden Board of Directors announced plans to sell the property and close the garden because of funding problems. The property was sold in February 2011, and in November 2011 the BBG conservation program and seed bank, now known as the Rae Selling Berry Seed Bank & Plant Conservation Program, completed the transfer to the Environmental Science and Management Program at Portland State University.

The Kellogg Creek Bridge spans Kellogg Creek in Milwaukie, Oregon, United States.