HEADWALL groomed Sunday morning! Learn to ski or board Tuesdays at Snowbowl in January with half priced lessons and rentals. Open daily 9:30 to 4:00 pm, Half day at 12:30 pm. HEADWALL groomed Sunday morning! Learn to ski or board Tuesdays at Snowbowl in January with half priced lessons and rentals. Open daily 9:30 to 4:00 pm, Half day at 12:30 pm. 49