Here is an overexposed view of Dana Couloir from the peak. The couloir is about 500 feet of vertical but you could still get
about 2000 feet of vertical skiing from the peak through the couloir to Dana Lake. I would definitely approach it from the bottom
this time of year since the hike on the trail to the peak would be very tough with skis and boots on your pack.
image keywords - Mount Dana, Yosemite, backcountry skiing