 Lake Malawi is sometimes called the Calendar Lake as it is about long and wide.The surface of Lake Malawi is located at above sea level, with a maximum depth of , which means the lake bottom is over below sea level at some points.The Shire River flows from the south end of the lake and joins the Zambezi River south in Mozambique.West of the Great Rift Valley, the land forms high plateaus, plateaus rise generally above sea level.