This trail runs along an old railroad grade through a scenic area just outside of Colfax. It is a Whitman County Park and nature preserve. Being a railroad grade there is virtually no elevation change so it's a nice walk for those who just want to saunter along a river bank and enjoy basalt cliffs and occasional wildlife. It's a quiet trail and accessible year-round.
At the three-mile mark the trail dead ends where a bridge across the river no longer exists. A tunnel is visible on the other side but you'll have to wade the river to get there.
The last 150 yards to the trailhead is best to walk when the road is wet as there is no gravel and Palouse mud is nothing to trifle with.