Experience the unforgettable adventure of climbing giant 300ft old-growth trees at Silver Falls State Park. This is one of the most unique activities in Oregon and top outdoor things to do near Portland. No experience required. This is a unique adventure, family friendly experience, and a must do outdoor activity, that should be at the top of your list. This experience will give you unforgettable memories, views, perspectives of nature, and there is nothing else like it. You will learn how to ascend some of the tallest trees in the world, high into the canopy of rare giant old-growth trees and experience an adventure that seems to take you out of this world. Learn about unique ecology, animals, and plants related to old-growth forests.