Visit one of the last remaining virgin lowland forests in the state of Washington; preserved as part of our natural heritage in this beautiful Wilderness Area. Hikers follow a path along the Boulder River and can experience firsthand the unique features of an old-growth forest. Note the sunlight shining through openings in the forest canopy, the great diversity in the size and age of the Douglas-firs (some over 200 years old), and the abundance of standing and fallen snags in various stages of decomposition. Large fallen logs in the river aid in maintaining this valuable water ecosystem. The area is rich in native flora and fauna. Hundreds of varieties of mosses, ferns, and fungi grow along the banks of the trail. Look closely for the Pacific yew and the creeping Bunchberry. Many animal species, such as the Northern spotted owl, the flying squirrel, the marbled murrelet, and the fringed pinesap require the environment of an ancient forest to sustain healthy and viable populations. As always, tread lightly and pack it all out. From I-5 go east from Arlington on SR 530 through the town of Oso; continue 8 miles east to mile marker #41; turn south on French Creek Road (Forest Service Road 2010); drive about 4 miles to a parking area at the trail's head.
