I have been enjoying your adventure posts immensely; keep up the great work!
I lead hikes for the local chapter of the Sierra Club in Tucson, and in mid-August we’ll be doing a 7-day backpacking adventure in the High Sierra. We’ll be accessing the John Muir Trail, with elevations ranging from 9,000 to 12,000 feet. How cold can it get at this time of year and what clothes/protection would you recommend? Would a light windbreaker over a fleece with gloves and hat be sufficient? Or would you recommend a down jacket, etc.?