Of all the trails in the Blue Joint region, this one is probably my favorite. Rather than following creeks, it traces a fantastic ridgeline.
The trailhead is hidden way back on gravel roads that keep getting less and less distinct, but few people park at the trailhead. Most people do the trail from the junction with Little Blue Joint.
After climbing up Little Blue Joint keep climbing for another two miles. Don't be surprised if you need to lean against the occasional tree to rest. The climbing is steep. Along the way, you'll pop out of the forest and onto the ridge, at which point you'll understand where the "razorback" name comes from. Behind you are outstanding views of the Bitterroot mountain rising out of the West Fork Valley. In front of you, into the distance, is the expanse of the Selway and Frank Church Wilderness Areas, the largest contiguous wilderness in the lower 48.
While on top, you can look at the remains of the old fire lookout. Afterward, it's time for a fun downhill to the junction with Deer Creek Trail
This trail can be combined with Little Blue Joint, Deer Creek, and Blue Joint.