Sign on the butterfield side says it opens 6/1.
They say it's opening later but in reality it's usually open ASAP. I think they hedge their bets against snowfall/snowmelt. Last day of the year this year was almost a day too late, VERY slippery on top.
As this is my preferred commute to Summit Machine I'll be keeping a close eye on this. I'll post up when it finally opens/