The hike to Upper Lena isn't too bad. I did a day trip with my little bro later in the summer where we entered via the Putvin trail, climbed Mt. Stone, and the hiked out via Upper down to lower Lena lake. It was a long day, but pretty fun. The high ridgeline territory between Mt. Stone and Upper Lena is very nice. There is a way trail that is easy to lose (especially if you are trying to move quickly like we were on that day), and wouldn't be visible with the snow level where its at right now....but navigating the territory is pretty straight forward. You could even drop down to Scout Lake for a little solitude.