 Complete the following phrase:  Prior to 1946, the mountain had been the site of skiing using a crude boat lift, and by the use of the jeep trails up the back side of the mountain on Midnight Mine Road. In 1941, Aspens first national downhill and slalom championships were held March 89. Fritz Benedict visited Aspen for the first time, the father of the 10th Mountain Hut and Trail System. The foundation of the ski area in 1946 was accomplished with the installation of the single-seat chairlift, Lift-1. When it began operations on December 14, 1946, it was the longest chairlift in the world. Many of the first employees were veterans of the 10th Mountain Division, which had trained at Camp Hale, including Friedl Pfeifer of Austria and Pete Seibert. Before the war, Pfeifer had headed the ski school at Sun Valley and did the same at Aspen; Seibert was a member of the Aspen ski patrol would later found Vail Mountain in 1962. In its fourth season, Aspen hosted the 