After the park was well established and visitors began to rely more on automobiles, work was begun on the long Going-to-the-Sun Road, completed in 1932. Also known simply as the Sun Road, the road bisects the park and is the only route that ventures deep into the park, going over the Continental Divide at Logan Pass, at the midway point. The Sun Road is also listed on the National Register of Historic Places and in 1985 was designated a National Historic Civil Engineering Landmark. Another route, along the southern boundary between the park and National Forests, is US Route 2, which crosses the Continental Divide at Marias Pass and connects the towns of West Glacier and East Glacier.