Castle Rock is a popular hike from Nez Perce Pass on the Bitterroot National Forest. It can also be accessed from a trailhead near Bare Cone Lookout to the east. Both routes are about the same distance and terrain. The last 200 feet is a scramble to the summit over loose rock and bedrock from either a notch in the cliffs on the west side or more open loose rock routes on the east side. Most folks will be using both hands and feet on this one. Summit views are tremendous to the north where you’ll be looking into the rugged southern mountains of the Selway Bitterroot Wilderness Area.