Hiked vivian on 3/25 and can add a little more flavor. At least early in the day while the ice is still firm, you want (need) an ice axe above high creek and preferably crampons. I went up in microspikes and stopped a few hundred vertical feet before the summit (on the exposed traverse) because of ice and effort needed to carve out steps in the crust (approx 10 am). Maybe the crampons in my pack would have done the trick but didn’t want to try to change out on the slick slope. Coming down from the high creek ridge i slipped twice in the microspikes and needed the ice axe. Would not go up there without one until the ice passes.