Gorgeous hike above treeline. Recommend taking hiking sticks as there are a few places where you'll need extra balance. Also recommend taking gloves, hat, raingear and puffy. We went on August 13, 2016 and it snowed on us! We went all the way to the top (13,000) but the weather changed and we decided to head back down. We started at the Linkins trailhead.
One of my favorite hikes, beautiful valley and nice uphill hike to the saddle overlooking the lake. 2 hours up. Usually very windy at the top and can be a little cold, so take a light jacket. The entire loop from lower Lost Man to Upper, or also the other way is a great full day hike.