Just got this from the Mount Washington Valley Chamber of Commerce:
Opening Dates
Attitash Ski Resort -- Opening Date: November 22
Black Mountain -- Opening Date: December 12
Cranmore Mountain Resort -- Opening Date: Tubing Hill opens November 28, Skiing begins December 6
Great Glen Trails -- Opening Date: December 6 for the Atomic Sprints
Jackson Ski Touring Foundation -- Opening Date: December 1 (weather permitting)
King Pine --Opening Date: December 12
Wildcat Mountain --Opening Date: November 29