Sool has an area, as defined by the former municipal boundaries in 2006, of , covering a considerable area to the north and east of the village. This area reaches up to the peak of the Gufelstock (). Of this area, 23.6% is used for agricultural purposes, while 42% is forested. Of the rest of the land, 1.2% is settled (buildings or roads) and the remainder (33.2%) is non-productive (rivers, glaciers or mountains).