Deer Valley is adding an astonishing 3,700 acres of terrain, a new village called Deer Valley East, a Four Seasons Resort, 16 new chair lifts, a 10-passenger gondola, and 135 freshly cut ski runs.

Deer Valley has never been known for glade skiing, but that may change this winter after the biggest terrain expansion in the world. Last year I went out to Utah to take an advance look at the biggest ...