40 Mile Loop

The 40-Mile Loop is a partially completed greenway trail around and through Portland in the U.S. state of Oregon. It was proposed in 1903 by the Olmsted Brothers architecture firm as part of the development of Forest Park. One greenway expert calls it "one of the most creative and resourceful greenway projects in the country."

The name's "forty" was obsolete within a few decades after it was proposed. The proposed total path is now about 140 miles (230 km) long, and connects more than thirty city parks. Similarly, "loop" is not entirely accurate. There are several subloops, cutoffs and spur trails within the system. One spur is proposed to connect to the Pacific Crest Trail.

As part of beautification planning for the Lewis and Clark Centennial Exposition of 1905, Portland's recently established Parks Board invited the Olmsted Brothers in 1903. Besides suggestions for Washington Park, their research of existing city parks resulted in a bold proposal for a loop of interconnected parks around the city, instead of a traditional plan of scattered parks: "A connected system of parks and parkways is manifestly far more complete and useful than a series of isolated parks." As the brothers puzzled over a name for the system, one asked the other "What would you call a forty-mile loop?" The firm was famous for its straightforward names, so they left it at that.

Little action occurred until a $1 million city bond measure in 1907 passed, which was used to develop existing parks. In 1912, another city planner, Edward H. Bennett, also recommended developing a ridgetop park long the West Hills. A $2 million bond issue to acquire the necessary land was voted down. However, shortly afterward, most of the lots sold in Forest Park forfeited to the city or Multnomah County due to high assessments for road building, and a landslide.

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