 SR 16 crosses Walker Mountain in a curving route, coming down into the Rich Valley and crossing the North Fork Holston River at Chatham Hill and State Route 42 soon after at Black Hill.Again SR 16 heads uphill, climbing Brushy Mountain to the county line.Another twisty descent takes SR 16 down Brushy Mountain into the Freestone Valley, but almost immediately it must rise again to cross Clinch Mountain.