At this point, the byway and Upper Imnaha Road become contiguous and run along the river's left bank. Blackhorse Campground is on the left shortly thereafter, and Blackhorse Creek enters from the left.
At this juncture, the byway and Upper Imnaha Road merge and follow the river's left bank. Blackhorse Campground is on the left soon after, and Blackhorse Creek enters from the left.