I now have the GPS tracks for all of the “Hiking Waterfalls in Oregon” guidebook! And I may have saved the best for last. The Opal Creek Wilderness is a low-elevation ancient forest that is home to the largest intact stand of old-growth forest in the western Cascades. Trees in this area can range up to 1,000 years old. Because the forest has remained intact for so long, the flora and fauna interact the way nature intended. Cycles that can take hundreds of years to complete have been left alone to do so, and in the process the forest filters Opal Creek to a state of pristine beauty. And it has a waterfall you can slide down!