When climbing Mt Langley in the winter there are a few good things to know:
1. If traveling in the winter, take the south fork - it is a shortcut! Also, since the trail is covered and the approach is forested, it is easy to accidentally take the south fork in the canyon, and it's good to be aware of this - I did this and I was dumfounded w/ some of the map discrepancies I found until I finally reached the Cottonwood Lakes!
2. While the Winter variation is more direct, it has difficulties of its own that are good to consider when planning on ascending this route - the terrain is strewn with huge boulders - this may require some scrambling while wearing snowshoes and can make routefinding difficult when you are close to the 'boulder field'. Keep this in mind and plan your way up the slope and through the rocks before you get too close! A benefit is that this variation doesn't exceed 40o in steepness.
3. The final scramble to the summit from the SE is very enjoyable in the winter and is one of the more interesting parts of the route.