In the foreground (bottom) is Catherine's Pass, Albion Basin, and the Sugarloaf area of Alta. If the area looks remarkably underdeveloped, you're right. The Sugarloaf lift was installed at Alta in 1967. In all likelihood the photo was taken in 1966 (or earlier) before the lift was installed. Sunnyside was installed in 1970. The Albion chair was installed in 1963, but is blocked by the lower portion of Mt. Wolverine.
Just to add further to the nostalgia, here's the cover of that issue of Skiing.