Forums Splitboard Talk Forum Splitboarding Mt. Rainier Reply To: Splitboarding Mt. Rainier April 28, 2006 at 4:41 am #588479 breschneid 35 Posts When did you encouter the sun cups of death? We are planing on starting our climb on June 30, and ending around July 3. The bigger suncups i’ve seen probably didnt get to be that size until late July, a week or two before August. You should be fine with your plans for late June/early July. But my understanding is that primo conditions for skiing from the top are earlier in May and June. Hit up the TAYers, they know whats up as far as what to expect for conditions. Plenty of collective knowledge on the PNW over there.