Cooper Mountain Nature Park is located on the edge of Beaverton. The 230-acre park, at 18892 SW Kemmer Road, Beaverton, offers visitors 3½ miles of trails (with varying levels of difficulty) that traverse the park and pass through each of its distinct habitats - from conifer forest to prairie to oak woodlands. Visitors will be rewarded with grand views of the Chehalem Mountains, close-up looks at Oregon white oaks and a small prairie that has sat relatively undisturbed for hundreds of years.