 It crosses the low McConnell Ridge at Green Spring into the Watauga Valley, and after running through that valley for a while it turns north to cross the Great Knobs, mostly along a small creek.SR 75 enters the town of Abingdon and crosses Interstate 81/U.S.Route 58, at which point U.S. Route 58 Alternate begins along SR 75, and then ends at the intersection with U.S. Route 11 downtown.