The Pleasant Valley Loop Trail is a moderately challenging trail located in the William O. Douglas Wilderness area. It offers varying loop lengths and generally follows the American River.  The Pleasant Valley Loop forms a long thin oval around Highway 410, just east of Mount Rainier. Although this trail never ventures too far from the Highway, hikers will get a wilderness experience nonetheless.

The portion of the trail south of the highway is more scenic, following along the American River and falling within the William O. Douglas Wilderness. On the north side of the highway, the trail trends closer to the road, and has a few connections along dirt roads. Most of the loop travels through forest that burned in 2017, which can lead to blowdowns over the trail.