Date is a guess. Skied to summit while on a multi-day loop trip up Necklace valley, then over to Pea Soup Lake, Jade Lake, Marmot Lake, up over Terrace Mountain and out past Ptarmigan Lakes to the road. That northeast slope of Hinman is perfect for ski runs. In fact, it had been considered to be developed as a ski resort before the area was designated wilderness, thank gawd that never happened.
Started at the Neclace valley trailhead wnet up to tank Lakes, over to La Bohn Lakes and the up Hinman an down to shovel lake. we went out Salmon La Sac, an awesome through hike. Beautiful views from the summit but its just a huge pile of crubling rock, it was hard to find anything solid to stand on. The glacier is the most solid thing on the mountain. Very cool though
Backpacked in from Snoqualmie Pass, crossed over Red Pass and took the old Cascade Crest Trail down to the Middle Fork Snoqualmie, and camped at Williams Lake the first night. Climbed it via the Chain Lakes Basin - probably my favorite place in the ALW, incredibly remote and beautiful.