We used this trail to go up to Griffith Peak on our way to Charleston Peak. Nice graded, shady trail.
Although the summit of Charleston appears as if the snow has lessened, the South Loop Trail has plenty above 10,000 feet. We tried to get to the junction using only snowshoes, but it became quite tedious and tiring to break trail with a bit of powder and depth. If you want to summit Charleston Peak this month, you best use the North Loop Trail.