I was thinking that getting to the top of the pass would be the difficult part. I found one trip report where they turned around due to snow on the switchbacks. I wasn't sure how the hikes to Cirque and Langley compared to each other once hikers reached the top of the pass.
Thank you for the information on Lone Pine Peak. I am interested...
Do you happen to have a GPX file for the portion of the hike that is off trail?
