I agree with the posters who say that the Cascades have never really gone to sleep...I do believe that is the case...there used to be Ice Caves up near Mt Rainier, and people used to be able to go inside of them...but I think in the last several years, those caves have been closed off to tourists, simply because they are slowly melting, and have become unstable and dangerous...so why are they melting? I suspect because the activity beneath Rainier is very much alive and active, and causing the ice to melt...