Started out at Climber's Bivouac and climbed up the Ptarmigan/Monitor Ridge Route. Excellent and demanding non-technical climb with Clara Erickson; harder than I thought it would be given the moving ash/sand during the final mile to the summit. Beautiful hike with a variety of conditions: lower portion through forest with some older growth Douglas firs during the Ptarmigan trail transitioning to the rugged and rocky scramble portion on the ridge and finally the sandy / ash portion. Wear short gators! It keeps the sand and ash out of your shoes /boots.