This cave is part of the Washington State parks system. It is a 600 foot ancient lava tube type cave. The elevation is at 3400 feet so the night air temperature dips below freezing and it is trapped in the cave throughout the day. While melting snow or rain from above eventually seeps down to the cave ceiling it forms icicles. And also stalagmites and columns grow from the ground up as the water drips down. I believe my friend Gavin and I were the first ones of the season to enter the cave because we needed to carve steps in the ice to descend into the cave.