Good trench until about a mile before Willow Lake. Put on snow shoes a little before that. Had to break new trail as I got close to Willow lake, and after. Attempted to follow the summer route for the last 1000 ft, but there was 3-4 inches of windblown crusted snow, over a weak layer. I was poking through to deeper snow, so I opted to go up near the rocks (see yellow line on photo). Looking westward, the red line in the photo might have been an option. Ice ax was helpful on the way down, since the mix of snow and ice around the rocks made the descent slippery. Beautiful day, except for a windy summit. Frozen waterfall at Willow lake was spectacular.
Photos (click for slideshow):