A walking aid (01, 02), in particular for shoes having a solid sole, a shoe system, and a system including the walking aid (01, 02) and a stick (18, 19), such as a walking stick or a ski stick. In exemplary embodiments, walking aid (01, 02) includes a main body (02.1, 0.2) for detachable arrangement on a sole and at least one fastening means (03.1, 03.2, 03) detachably fastened to the shoe, and, when fastened to the shoe, the main body (02.1, 02) extends from the toe of the shoe up to 40% of a length of the sole.
