At Deer Valley, the slopes in the advanced or expert category are marked with single or double diamonds. Rarely are they groomed or only every other day and are therefore the best choice for lovers of mogul runs. Most ski-runs of the difficult category can be found on Bald Mountain, reaching a height of 2,865m (9,400ft) altitude. Especially Orient Express, Narrow Gauge or Morning Star, all directed towards the north and located next to the 3-seater chairlifts Mayflower, will challenge even a very advanced skier. The many bumps, humps and peaks of Reward and Ratter, both leading to the 4-seater chairlift Wasatch Express, are bound to be liked by expert skiers as they provide an extra dose of challenge and excitement. For all lovers of the light and fluffy powder Utah is internationally known for, the avalanche controlled powder snow slopes of Ontario Bowl, located at the northern flank of Flagstaff Mountain, or Daly Bowl and Daly Chutes, both located at the ridge of Empire Mountain, are highly recommended. In order to fully use the powder, one needs to walk a little to get to the deep powder snow areas.
At the Deer Valley Resort, the so-called tree skiing off-piste is explicitly allowed in designated areas, except in two on the slope map marked areas at Flagstaff Mountain. For this variant of alpine ski sports the Triangle Trees area, just below the Tycoon ski-run, and the Sunset Glade, close to the Sunset slope, are the perfect places to exercise this kind of skiing. Both areas are also sited at Bald Mountain. A wonderful combination of bowls (deep powder snow slopes) and tree skiing areas is the Centennial slope on the 2,743m (9,000ft) high Lady Morgan Mountain.
In the advanced/ expert category, the Deer Valley Resort receives 3 out of 5 stars.