Hiking boots (it’s important to wear in new boots before hiking, to avoid blisters).
Long sleeve t-shirts (one per day).
Walking pants.
Thermal hiking undergarments.
Wool sweater or down vest.
Insulated parka or down jacket.
Thermal sleeping clothes.
Long cotton pants.
Wool gloves.
Scarf.
Wool socks.
Wool cap, and hat or cap for shade.
Waterproof Gore-Tex jacket and pants, or rain poncho.
Comfortable sandals or slippers (for use at the lodges).
Small towel.
Additional gear: Hiking poles are very useful for providing balance and walking ease on hikes.
Gear:
Flashlight or headlamp.
Pocket knife.
Water bottle or canteen.
Plastic baggies, for batteries and other items.
Plastic bags for dirty or wet clothing.
Daypack for short hikes (large enough for snacks, a change of clothing, water).
Binoculars.
Spare memory cards and batteries for your cameras (batteries can lose their charge due to low temperatures, and there is no current to charge them along the mountain route).