Date is a guess, might be off by a year. One of my favorite areas. West glacier to the SW ridge is easy. Altho later in year some ice and small crevasses can appear on the small glacier.
The summit register had a recent signature from none other than world famous local Pete Schoening, who went on to those greater mountains in the sky in 2004. He added "Thanks for the memories!", perhaps saying goodbye to the Cascades.