The primary road access to the Queenstown area is via State Highway 6 (SH6), from Cromwell through the Kawarau Gorge to Frankton, where a 9 km spur (SH6A) leads to the CBD and connects with the Glenorchy Road. SH6 continues south, crossing the Kawarau river before heading down the eastern side of Lake Wakatipu to Kingston before crossing the provincial boundary and emerging on the plains of Southland, terminating in the city of Invercargill. A difficult road over the Crown Range leads to Cardrona skifield and Wanaka, and is New Zealand's highest paved public road pass.