<diacritize> This section of land is divided lengthwise by the Rhone , a river that flows westward from the Rhone glacier in the Central Alps to Lake Geneva a distance of about 100 miles 170 km . <yor>This section of land is divided lengthwise by the Rhône , a river that flows westward from the Rhône glacier in the Central Alps to Lake Geneva a distance of about 100 miles 170 km . 