We live about three hours away from Glacier, and considering the amount of snow we got this winter, and that Glacier received over 150% more snow than in the past few winters,and that the plow operators have not got to the bad spots yet, I highly doubt the going to the sun road will be open much before July. Even if they do get it all plowed, the risk of avalanches will still be high and that might keep the road closed too. My advice is to keep an eye on their website and to wish for good weather to help melt it faster.