Essential

-water (if temps are below freezing, insulate water bottle with foam or clothing)
-food (lunch and/or snack)
-raingear (jacket and pants)
-extra sweater or fleece
-map
-waterproof and warm boots
-hat
-gloves or mittens
-sunglasses (if travelling on snow)
-large orange garbage bag (can be used as emergency shelter or to signal emergency aircraft)
-if travelling in steep areas check avalanche conditions before you leave the house (www.avalanche.ca) or check with organizer.
-check with organizer to see if avalanche rescue equipment is needed (peips, shovel, probe)

Recommended

-first aid kit (band-aids, alcohol wipes, 2 bandanas or triangular bandages, tweezers)
-compass
-knife
-flashlight
-lighter or waterproof matches
-hot drink in a thermos